When Trial of Knowledge enters, draw three cards, then discard a card. When a Cartouche you control enters, return Trial of Knowledge to its owner's hand.
Trial of Knowledge
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Enchantment
When Trial of Knowledge enters, draw three cards, then discard a card. When a Cartouche you control enters, return Trial of Knowledge to its owner's hand.
原文Each Trial has an ability to return to your hand when a Cartouche enters the battlefield under your control. The Trial is returned to its owner's hand only if it's on the battlefield as the ability resolves.