Attributes (* means required)

Can Be Block

<CARD_V2 ExportVersion="1">
<FILENAME text="SOME_CARD_NAME_CW_1234" />
<CARDNAME text="SOME_CARD_NAME" />
<TITLE>...</TITLE>
</CARD_V2

<TITLE>
<LOCALISED_TEXT LanguageCode="en-US"><![CDATA[English Name]]></LOCALISED_TEXT>
<LOCALISED_TEXT LanguageCode="fr-FR"><![CDATA[French Name]]></LOCALISED_TEXT>
...
</TITLE>

TITLE
FLAVOURTEXT
SPELL_ABILITY
STATIC_ABILITY
TRIGGERED_ABILITY
UTILITY_ABILITY

LanguageCode should be one of the language codes the game recognizes (in this order), and then the CDATA section should contain the text for that language:
en-US (English - English)
fr-FR (French - français)
es-ES (Spanish - Español)
de-DE (German - Deutche)
it-IT (Italian - italiano)
jp-JA (Japanese - 日本語)
ko-KR (Korean - 한국어)
ru-RU (Russian - русский)
pt-BR (Portuguese - português)
zh-CN (Simplified Chinese - 简体中文)
zh-HK (Traditional Chinese - 繁體中文)

<LOCALISED_TEXT LanguageCode="en-US"><![CDATA[English Name]]></LOCALISED_TEXT>
<LOCALISED_TEXT LanguageCode="fr-FR"><![CDATA[French Name]]></LOCALISED_TEXT>

"value" can be any text. In the CW, for all non-tokens, non-transform cards, it's the same as the card's CARDNAME field. For most mods, it's a number, such as the MultiverseID. For some animations to work right, the "value" must be parsed as a number to work properly, which is why transform cards don't get the normal ARTID "value".

<FLAVOURTEXT>
<LOCALISED_TEXT LanguageCode="en-US"><![CDATA[The overconfident are the most vulnerable.]]></LOCALISED_TEXT>
<LOCALISED_TEXT LanguageCode="fr-FR"><![CDATA[The overconfident are the most vulnerable.]]></LOCALISED_TEXT>
</FLAVOURTEXT>

*metaname (title-case supertype)

*metaname (title-case subtype)

resource_id (number)
replacement_effect (bool)

LOCALIZED_TEXT
COST
TARGET
TARGET_DEFINITION
RESOLUTION_TIME_ACTION
CONTINUOUS_ACTION
PLAY_TIME_ACTION
FILTER
FILTER_CONDITION
DURATION
AUTO_SKIP

<SPELL_ABILITY>
<LOCALISED_TEXT LanguageCode="en-US"><![CDATA[Draw two cards.]]></LOCALISED_TEXT>
<RESOLUTION_TIME_ACTION>
local oPlayer = EffectController()
if oPlayer ~= nil then
oPlayer:DrawCards(2)
end
</RESOLUTION_TIME_ACTION>
</SPELL_ABILITY>

resource_id (number)
replacement_effect (bool)
active_zone (zone constant)

LOCALIZED_TEXT
CONTINUOUS_ACTION
FILTER
FILTER_CONDITION

A STATIC_ABILITY block is one which doesn't trigger, activate, or have any special activation at all other than possibly being the right zone (on the battlefield, by default). It's simply always active, which means it only accepts child tags which are also "always active", meaning CONTINUOUS_ACTION tags are the only actions that are allowed here. In this ability type, they get no DURATION tag (unlike all other ability types).

<STATIC_ABILITY>
<LOCALISED_TEXT LanguageCode="en-US"><![CDATA[Enchanted creature has shroud.]]></LOCALISED_TEXT>
<CONTINUOUS_ACTION layer="6">
local oParent = EffectSource():GetParent()
if oParent ~= nil then
oParent:GetCurrentCharacteristics():Bool_Set(CHARACTERISTIC_SHROUD, 1)
end
</CONTINUOUS_ACTION>
</STATIC_ABILITY>

resource_id (number)
replacement_effect (bool)
active_zone (zone constant)

LOCALIZED_TEXT
*TRIGGER
TARGET
TARGET_DEFINITION
PLAY_TIME_ACTION
RESOLUTION_TIME_ACTION
CONTINUOUS_ACTION
FILTER
FILTER_CONDITION
DURATION
AUTO_SKIP

<TRIGGERED_ABILITY>
<LOCALISED_TEXT LanguageCode="en-US"><![CDATA[When Abundant Growth enters the battlefield, draw a card.]]></LOCALISED_TEXT>
<TRIGGER value="ZONECHANGE_END" simple_qualifier="self" to_zone="ZONE_BATTLEFIELD" />
<RESOLUTION_TIME_ACTION>
local oController = EffectController()
if oController ~= nil then
oController:DrawCards(1)
end
</RESOLUTION_TIME_ACTION>
</TRIGGERED_ABILITY>

forced_skip (bool)
auto_skip (bool)
filter_zone (constant)
active_zone (zone constant)

LOCALIZED_TEXT
COST
TARGET
TARGET_DEFINITION
PLAY_TIME_ACTION
RESOLUTION_TIME_ACTION
CONTINUOUS_ACTION
FILTER
FILTER_CONDITION
DURATION
AUTO_SKIP
AI_AVAILABILITY

<ACTIVATED_ABILITY>
<LOCALISED_TEXT LanguageCode="en-US"><![CDATA[{U}: Advanced Hoverguard gains shroud until end of turn.]]></LOCALISED_TEXT>
<COST mana_cost="{U}" type="Mana" />
<CONTINUOUS_ACTION layer="6">
local oSource = EffectSource()
if oSource ~= nil then
oSource:GetCurrentCharacteristics():Bool_Set(CHARACTERISTIC_SHROUD, 1)
end
</CONTINUOUS_ACTION>
<DURATION simple_duration="UntilEOT" />
<AI_AVAILABILITY type="in_response" response_source="1" />
</ACTIVATED_ABILITY>

qualifier (text)
resource_id (number)
replacement_effect (bool)
qualifier (text)
origin_controller_can_use (bool)
active_zone (zone constant)

LOCALIZED_TEXT
PLAY_TIME_ACTION
RESOLUTION_TIME_ACTION
CONTINUOUS_ACTION
AUTO_SKIP

<UTILITY_ABILITY qualifier="Additional">
<LOCALISED_TEXT LanguageCode="en-US"><![CDATA[As an additional cost to cast Bone Splinters, sacrifice a creature.]]></LOCALISED_TEXT>
<COST type="Sacrifice" definition="0" compartment="1" query_tag="CARD_QUERY_CHOOSE_CREATURE_TO_SACRIFICE" item_count="1" />
<COST_DEFINITION id="0">
local oFilter = ClearFilter()
oFilter:Add(FE_TYPE, OP_IS, CARD_TYPE_CREATURE)
oFilter:Add(FE_CONTROLLER, OP_IS, EffectController())
</COST_DEFINITION>
</UTILITY_ABILITY>

LOCALIZED_TEXT
PRODUCES

<MANA_ABILITY>
<LOCALISED_TEXT LanguageCode="en-US"><![CDATA[{T}: Add {W} to your mana pool.]]></LOCALISED_TEXT>
<PRODUCES amount="{W}" />
</MANA_ABILITY>

filter_id (number)
repeating (bool)

SPELL_ABILITY
ACTIVATED_ABILITY
TRIGGERED_ABILITY
UTILITY_ABILITY

<PLAY_TIME_ACTION>
local oDelayDC = EffectDC():Make_Chest(1)
local oTargets = EffectDC():Get_Targets(0)
if oTargets ~= nil then
oDelayDC:Set_Int(0, oTargets:Count())
end
</PLAY_TIME_ACTION>

This stores the number of targets as soon as they're chosen so this number can be used later.

RESOLUTION_TIME_ACTION

filter_id (number)
repeating (bool)

SPELL_ABILITY
ACTIVATED_ABILITY
TRIGGERED_ABILITY
UTILITY_ABILITY

<RESOLUTION_TIME_ACTION>
local oController = EffectController()
if oController ~= nil then
oController:DrawCards(1)
end
</RESOLUTION_TIME_ACTION>

SPELL_ABILITY
STATIC_ABILITY
ACTIVATED_ABILITY
TRIGGERED_ABILITY
UTILITY_ABILITY

<CONTINUOUS_ACTION layer="6">
local oSource = EffectSource()
if oSource ~= nil then
oSource:GetCurrentCharacteristics():Bool_Set(CHARACTERISTIC_SHROUD, 1)
end
</CONTINUOUS_ACTION>

*characteristic (characteristic constant)

This is used when a card has an ability for which there's a simple CHARACTERISTIC constant, such as flying, trample, or first strike. This allows the card to easily be determined to have flying from any zone, and it allows the game to handle everything necessary for the ability including any badges the game engine assigns for that ability.

<STATIC_ABILITY>
<LOCALISED_TEXT LanguageCode="en-US"><![CDATA[Trample]]></LOCALISED_TEXT>
<INTRINSIC characteristic="CHARACTERISTIC_TRAMPLE" />
</STATIC_ABILITY>

always (bool)
no_effect_source (bool)
no_trigger_object (bool)

SPELL_ABILITY
ACTIVATED_ABILITY
TRIGGERED_ABILITY
UTILITY_ABILITY

SPELL_ABILITY
ACTIVATED_ABILITY
?UTILITY_ABILITY

<AVAILABILITY>
return EffectController():MyTurn() and MTG():GetPhase() == PHASE_MAIN_1
</AVAILABILITY>
Means this ability can only be activated on your turn during your first main phase.

type (text)
restriction_type (text)
response_source (bool)
response_target (bool)
window_step (text)
window_turn (text)

CARD
ACTIVATED_ABILITY

This tells the AI when to consider this ability or spell. If present, then the AI will ONLY consider it when told to. If not present, then it will be considered any time it is possible to use.
"type" can be "in_response", "restriction", or window.
If it is "in_response", then either "response_source" or "response_target" should be true (or both).
If it is "restriction", then "restriction_type" must be present.
If it is "window", then either "window_step" or "window_turn" must be set.
"restriction_type" can only be "equip".
"window_step" can be any step found in the Decompilable LOL contents page. Remove "STEP_" and make it lowercase.
"window_turn" can be "my_turn" or "their_turn".
A spell or ability can have multiple instances of AI_AVAILABILITY tags. If any returns true, then the AI will consider the ability. For any given one to return true, all attributes present must return true.

<AI_AVAILABILITY type="restriction" restriction_type="equip" />
Used for equipment.

or

<AI_AVAILABILITY window_step="begin_combat" />
Used for abilities or spells that tap creatures (limiting the AI to tapping creatures only right before combat).

AI_SIMPLIFIED_TARGETING

*compartment (number)
*hint (text)

SPELL_ABILITY
TRIGGERED_ABILITY
UTILITY_ABILITY
ACTIVATED_ABILITY

Informs the AI when it should ignore possibilities even though the code of the card technically allows them. This can speed up the AI by a large amount sometimes.
"compartment" is the compartment of the TARGET tag for which this hint applies.
"hint" can be:
HINT_ALLIED
HINT_ALLIED_ONLY
HINT_ENEMY
HINT_ENEMY_ONLY
HINT_NEUTRAL

<AI_SIMPLIFIED_TARGETING compartment="0" hint="HINT_ALLIED_ONLY" />
This would exist on Giant Growth. Technically, the AI can target your creatures, too, but this informs the AI to ignore such possibilities (because they're so rarely useful, that it's an overall waste of processing time).

always_prompt (bool)
tag (text permanent entry)

TRIGGERED_ABILITY
SPELL_ABILITY

If present, then the player will be given the option to use the ability if they want to. If they have the game setting "Always use optional abilities" checked, then MAY tags are ignored UNLESS they have the attribute "always_prompt" set to true.
If it's a block, then that block should return true or false based on what the AI should do. The AI will (seemingly) always use or not use an optional ability based on whether or not the block returns true.

*value (trigger constant)
simple_qualifier (text)
to_zone (zone constant)
from_zone (zone constant)
pre_trigger (bool)
damage_type (text)

TRIGGERED_ABILITY
UTILITY_ABILITY?

The trigger constant in "value" should NOT include the "TRIGGER_" prefix as listed in the Decompilable LOL Contents.
"to_zone" and "from_zone" are only valid for triggers involving zone changes. If one (or both) is excluded, it will evaluate true as if set to ZONE_ANY.
If "pre_trigger" is true, then this ability will fire before the effect that triggered it resolves. Combined with the "replacement_effect" attribute in the ability tag, it allows you to replace events. For instance, if your opponent would draw a card, you draw a card instead.
"damage_type" can be:
combat
noncombat
all
"simple_qualifier" can be the following:
self
controller
objectyoucontrol
another
object

<TRIGGER value="ZONECHANGE_BEGIN" simple_qualifier="another" to_zone="ZONE_GRAVEYARD" from_zone="ZONE_BATTLEFIELD">
return TriggerObject():GetCardType():Test(CARD_TYPE_CREATURE)
</TRIGGER>

Whenever another creature dies...

*type (text)
mana_cost (mana string)
definition (number)
compartment (number)
query_tag (text_permanent entry)
item_count (number)
item_count_any_number_of (bool)
amount (number)
counter_type (text)

UTILITY_ABILITY
ACTIVATED_ABILITY

*PREREQUISITE
PLAY_TIME_ACTION
RESOLUTION_TIME_ACTION
?CONTINUOUS_ACTION

In order to be a block tag (used for very complex costs), "type" must be set to "Generic".
PREREQUISITE is only required for generic costs.
For generic costs, the actual payment of the cost will be handled in PTAs and RTAs.
TYPE can be any of the following:
Mana
Generic
TapSelf
Tap
SacrificeSelf
Sacrifice
DiscardSelf
Discard
RemoveCountersSelf
AddCountersSelf
Life
ExileSelf
Exile
Return_To_HandSelf
Return_to_hand
Reveal
RevealSelf

SPELL_ABILITY
UTILITY_ABILITY
ACTIVATED_ABILITY

<COST_DEFINITION id="0">
local oFilter = ClearFilter()
oFilter:Add(FE_TYPE, OP_IS, CARD_TYPE_LAND)
</COST_DEFINITION>
This will make the COST tag only allow the player to choose lands (generally only lands they control, which is not normally a default for other types of filters).

<COST>
<PREREQUISITE>
return EffectController():Hand_Count() &gt; 0
</PREREQUISITE>
...
</COST>

The cost can only be paid if you have at least one card in hand.

*tag (text)
*definition (number)
*compartment (number)
*count (number)
up_to (bool)
not_targeted (bool)
any_number_of (number)

SPELL_ABILITY
STATIC_ABILITY
TRIGGERED_ABILITY
UTILITY_ABILITY

"count" may be ommitted only if "up_to" is true.
"definition" should be the id if the TARGET_DEFINITION tag used to filter targets.
"compartment" should be the chest register the targets will be placed in.
"tag" refers to a TEXT_PERMANENT entry.
If "up_to" is true, the player will not be forced to target any, and may choose any number up to the "count".
If "not_targeted" is true, then the "BECAME_TARGET" triggers will not fire.
If this is a block tag, then certain functions can be used in that block to dynamically set the number of targets and other things.

SPELL_ABILITY
STATIC_ABILITY
TRIGGERED_ABILITY
UTILITY_ABILITY

*filter_id (number)
reevaluates (bool)

SPELL_ABILITY
STATIC_ABILITY
TRIGGERED_ABILITY
UTILITY_ABILITY

A FILTER block can run lua code to isolate a group of cards or players (or both). It can then be called upon by action blocks. Those action blocks will run once for each valid object the filter finds, and during that run, the function FilteredCard() or FilteredPlayer() will return the current object for that iteration.
"filter_id" is how action tags will reference the filter created in this FILTER tag for use.
If "reevaluates" is true, then the filter runs again to determine the objects or players to include at the same times CONTINUOUS_ACTION blocks run (seemingly). Without it, the filter runs once when the ability resolves and those objects remain the same until the ability ends.

<FILTER filter_id="0">
local oFilter = ClearFilter()
oFilter:Add(FE_TYPE, OP_IS, CARD_TYPE_CREATURE)
oFilter:Add(FE_CHARACTERISTIC, OP_IS, CHARACTERISTIC_FLYING)
oFilter:Add(FE_CONTROLLER, OP_IS, EffectController())
</FILTER>
<CONTINUOUS_ACTION layer="7C" filter_id="0">
local oCard = FilteredCard()
...
</CONTINUOUS_ACTION>

The code in the CONTINUOUS_ACTION block will run once for every card found in the FILTER block, meaning all creatures you control with flying. Then, because it's a CONTINUOUS_ACTION, the whole thing will run again.

SPELL_ABILITY
STATIC_ABILITY
TRIGGERED_ABILITY
UTILITY_ABILITY

A filter condition is used when lua code needs to determine if each object in a filter is valid. For instance, if you need to check each one to make sure its power is greater than its toughness. You can filter for all creatures. Then, you can use a lua filter (FILTER_CONDITION) to check their P/T ratio.

SPELL_ABILITY
STATIC_ABILITY
TRIGGERED_ABILITY
UTILITY_ABILITY

A duration block returns true when all currently active CONTINUOUS_ACTION blocks should stop running. If an ability other than a STATIC_ABILITY has a CONTINUOUS_ACTION block, it MUST have a DURATION tag.
The only text accepted for "simple_duration" is "UntilEOT".

simple_cleanup (text)
fire_once (bool)

TRIGGERED_ABILITY

*title (text)
*body (text)
*zone (zone constant)

*text (text)
*power_boundary_min (number)
*power_boundary_max (number)

CARD
SPELL_ABILITY
TRIGGERED_ABILITY
ACTIVATED_ABILITY

<AUTHOR><![CDATA[RiiakShiNal]]></AUTHOR>
<EDITORS><![CDATA[RiiakShiNal, NivMizzet1, Xander9009]]></EDITORS>
<DATE><![CDATA[02-10-14, 14-12-15, 17-04-16]]></DATE>

This card was made on October 2, 2014 by RiiakShiNal. It was edited twice. First on December 14, 2015 by NivMizzet1, then again on April 17, 2016 by Xander9009.

This was originally designed for use with the Community Wad, but can be used on any card. Riiak Shi Nal's Deck Builder can display this.
Each date should be separate by a comma.
Dates should be formatted as DD-MM-YY (always two digits each, including leading zeros).
One date per EDITOR entry.