Concerted Effort 8/306 (Ravnica: City of Guilds)

At the beginning of each upkeep, creatures you control gain flying until end of turn if a creature you control has flying. The same is true for fear, first strike, double strike, landwalk, protection, trample, and vigilance.

NM - $11.00
LP - $9.00
MP - $7.00
HP - $4.50
DMG - $2.50