Cheapest priced copy (Assassin's Creed): $0.79 at Card Kingdom, near mint, their price list as of .
Bleeding Effect 
Enchantment · Uncommon · Assassin's Creed · #51
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.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.49 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Assassin's Creed | 51 | Uncommon | $0.79 | $0.49 |
| Assassin's Creed | 232 | Uncommon | — | — |
2 rulings from Wizards of the Coast
- 5 July 2024If one of the creature cards in your graveyard has one or more variants of the listed keywords (for example, hexproof from white), creatures you control gain those specific variants.
- 5 July 2024The 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.