Knowledge Exploitation

Knowledge Exploitation
Morningtide - Rare
Tribal Sorcery — Rogue
Darrell Riche
Prowl (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Rogue.)

Search target opponent's library for an instant or sorcery card. You may cast that card without paying its mana cost. Then that player shuffles his or her library.

Rulings

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