House Tyrell. Loyal.
Event. Cost: 2.

While you control Queen of Thorns, reduce the cost to play Olenna's Stratagem by 2.

Reaction: After you win an challenge, choose a non-event card in your discard pile and place it in shadows. While that card is in shadows it gains shadow (X). X is its printed cost. (Max 1 per challenge.)

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Old and the New (Unreleased) #95.

Link: Decklists

Olenna's Stratagem