Face Down Payoff

Payoff cards built around the face-down subgame: cost reducers for face-down creature spells, triggers when face-down creatures enter or turn face up, and anthems for the face-down crew. Obscuring Aether cheapens face-down casts, Kadena, Slinking Sorcerer draws on each face-down enter, Secret Plans buffs and cantrips on flip, and Trail of Mystery searches for lands when a creature turns face up. Distinct from morph.morph, morph.disguise, and morph.manifest, which detect cards that themselves carry those keywords; this scope is reserved for cards whose text scales with or rewards OTHER face-down creatures rather than just being face-down themselves.