Surging Obstruction 247 (Radiant Origins)

As long as you control a Chessman Bishop ally, this card costs 1 less to activate. Negate target card activation unless its controller pays (1). If that card has an odd reserve cost, negate its activation unless its controller pays (3) instead. (Zero is considered even.)

NM - $1.00
LP - $0.80
MP - $0.70
HP - $0.70
DMG - $0.70