Enchantment
At the beginning of combat on your turn, creatures you control gain flying until end of turn if a creature card in your graveyard has flying. The same is true for first strike, double strike, deathtouch, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance.
The set of creatures affected by Bleeding Effect’s ability and how they are affected is determined as the ability resolves. Creatures you begin to control later in the turn won’t gain any abilities, and the abilities gained won’t change if creature cards enter or leave your graveyard after the ability has resolved.