
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.
Concerted Effort has 4 printings, first in Ravnica: City of Guilds (2005). EDHREC ranks it #12,546 among Commander cards. It appears most in Odric, Lunarch Marshal decks (558 on EDHREC). 1 public deck on TCG runs it. It has 3 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.