Eidolon of the Great Revel
Enchantment Creature — Spirit
Whenever a player casts a spell with mana value 3 or less, this creature deals 2 damage to that player.
Xenagos reveled while Theros burned.
2/2
イラスト：
The List#JOU-94レア英語適正
裁定
2018年3月16日
Casting Eidolon of the Great Revel doesn’t cause its own ability to trigger. It must be on the battlefield when the spell is cast for its ability to trigger.
2018年3月16日
The amount of mana spent to cast a spell doesn’t change its converted mana cost. For example, a card cast with its morph ability has a converted mana cost of 0 even though 
was paid.
2018年3月16日
The converted mana cost of a spell with 
in its mana cost includes the value chosen for X.