Collectible Card Game Headquarters

Here I am with another deal
I have some problem with Omniscience: the rules for this card say
"- If the card has X in its mana cost, you must choose 0 as its value."
so I cannot just reduce indefinitely the cost of all my cards. I tried to reduce the cost separately for each card, but I've realized I can't do like I did

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<?xml version='1.0'?>
<CARD_V2>
  <FILENAME text="OMNISCIENCE_288937" />
  <CARDNAME text="OMNISCIENCE" />
  <TITLE>
    <LOCALISED_TEXT LanguageCode="en-US"><![CDATA[Omniscience]]></LOCALISED_TEXT>
    <LOCALISED_TEXT LanguageCode="it-IT"><![CDATA[Onniscenza]]></LOCALISED_TEXT>
  </TITLE>
  <MULTIVERSEID value="288937" />
  <ARTID value="288937" />
  <ARTIST name="Jason Chan" />
  <CASTING_COST cost="{7}{U}{U}{U}" />
  <FLAVOURTEXT>
    <LOCALISED_TEXT LanguageCode="en-US"><![CDATA["The things I once imagined would be my greatest achievements were only the first steps toward a future I can only begin to fathom."
—Jace Beleren]]></LOCALISED_TEXT>
    <LOCALISED_TEXT LanguageCode="it-IT"><![CDATA["Le cose che sognavo un tempo sarebbero le mie conquiste più grandi, se non fossero solo i primi passi verso un futuro che riesco appena a intravedere."
—Jace Beleren]]></LOCALISED_TEXT>
  </FLAVOURTEXT>
  <TYPE metaname="Enchantment" />
  <EXPANSION value="DPG" />
  <RARITY metaname="M" />
 
 <STATIC_ABILITY filter_zone="ZONE_HAND">
   <LOCALISED_TEXT LanguageCode="en-US"><![CDATA[You may cast nonland cards from your hand without paying their mana costs.]]></LOCALISED_TEXT>
   <LOCALISED_TEXT LanguageCode="it-IT"><![CDATA[Puoi lanciare carte non terra dalla tua mano senza pagare il loro costo di mana.]]></LOCALISED_TEXT>   
    <FILTER>
    local filteredCard = FilteredCard()
    local objectPlayer = Object():GetPlayer()
    return (FilteredCard():GetCardType():Test( CARD_TYPE_LAND ) == 0) and (FilteredCard():GetPlayer() == Object():GetPlayer()) and (FilteredCard() ~= nil and FilteredCard():GetZone() == ZONE_HAND)
    </FILTER>
    <CONTINUOUS_ACTION layer="6">
       if FilteredCard() ~= nil then
          FilteredCard():GetCurrentCharacteristics():GrantAbility(1)
       end
    </CONTINUOUS_ACTION>
 </STATIC_ABILITY>
 <UTILITY_ABILITY resource_id="1">
    <COST type="Mana" cost="{0}" qualifier="alternate" tag="ALTERNATE_COST_PAY_0" />
 </UTILITY_ABILITY>
 
  <HELP title="MORE_INFO_BADGE_TITLE_10" body="MORE_INFO_BADGE_BODY_10" zone="ZONE_ANY" />
  <AI_BASE_SCORE score="900" zone="ZONE_IN_PLAY" />
  <AI_BASE_SCORE score="1800" zone="ZONE_HAND" />
</CARD_V2>

I'm not sure if "without paying their mana costs" is perfectly equal to "paying rather than paying their mana costs", but if it is, I would take inspiration from Archive Trap:

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  <STATIC_ABILITY filter_zone="ZONE_HAND">
    <LOCALISED_TEXT LanguageCode="en-US"><![CDATA[You may cast nonland cards from your hand without paying their mana costs.]]></LOCALISED_TEXT>
    <LOCALISED_TEXT LanguageCode="it-IT"><![CDATA[Puoi lanciare carte non terra dalla tua mano senza pagare il loro costo di mana.]]></LOCALISED_TEXT>
    <FILTER>
    return FilteredCard() ~= nil and
    FilteredCard():GetCardType():Test( CARD_TYPE_LAND ) == 0 and
    FilteredCard():GetPlayer() == Object():GetPlayer()
    </FILTER>
    <CONTINUOUS_ACTION layer="6">
    if FilteredCard() ~= nil then
      FilteredCard():GetCurrentCharacteristics():GrantAbility(1)
    end
    </CONTINUOUS_ACTION>
  </STATIC_ABILITY>
  <UTILITY_ABILITY resource_id="1">
    <COST type="Mana" cost="{0}" qualifier="alternate" tag="ALTERNATE_COST_PAY_0" />
  </UTILITY_ABILITY>

(EDIT: Removed some useless junk from the filter)

Thanks for the suggestion, I'm gonna try it
Well it actually worked but I got 3 option for the cost, its normal mana cost and two times "pay ".
Okay maybe it's because I had two of it in play >.>

About the usage of the alternative costs, I want to add that I just coded Fist of Suns, and while paying doesn't have any problem, if the alternative cost requires to actually pay some mana, we have to check by ourselves if it can be paid: the alternative cost doesn't imply it.

If I code Fist of Suns like this:

Code: Select all

  <STATIC_ABILITY filter_zone="ZONE_HAND">
    <FILTER>
    return FilteredCard() ~= nil and
    FilteredCard():GetPlayer() == EffectController() and
    FilteredCard():GetCardType():Test( CARD_TYPE_LAND ) == 0
    </FILTER>
    <CONTINUOUS_ACTION layer="6">
    if FilteredCard() ~= nil then
       FilteredCard():GetCurrentCharacteristics():GrantAbility(1)
    end
    </CONTINUOUS_ACTION>
  </STATIC_ABILITY>
  <UTILITY_ABILITY resource_id="1">
    <COST type="Mana" cost="{W}{U}{B}{R}{G}" qualifier="alternate" tag="ALTERNATE_COST_PAY_WUBRG" />
  </UTILITY_ABILITY>

then I can choose the alternative cost even if I don't have enough mana, and if I make this choice, the spell will be cast for free.
With this little fix on the filter:

Code: Select all

    <FILTER>
    if EffectController():CanAfford("{W}{U}{B}{R}{G}") == 0 then
       return false
    else
       return FilteredCard() ~= nil and
       FilteredCard():GetPlayer() == EffectController() and
       FilteredCard():GetCardType():Test( CARD_TYPE_LAND ) == 0
    end
    </FILTER>

everything works OK.