M:tG card similarity search
1B · Instant
Until end of turn, each creature you control becomes a black Shade and gains "{B}: This creature gets +1/+1 until end of turn."
| Name | Mana | Type | Text | 
|---|---|---|---|
| Traitor's Clutch | 4B | Instant | Target creature gets +1/+0, becomes black, and gains shadow until end of turn. (It can block or be blocked by only creatures with shadow.) Flashback {1}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.) | 
| Sedge Sliver | 2R | Creature — Sliver | All Sliver creatures have "This creature gets +1/+1 as long as you control a Swamp." All Slivers have "{B}: Regenerate this permanent." (The next time it would be destroyed, instead tap it, remove it from combat, and heal all damage on it.) 2/2 | 
| Streambed Aquitects | 1UU | Creature — Merfolk Scout | {T}: Target Merfolk creature gets +1/+1 and gains islandwalk until end of turn. (It can't be blocked as long as defending player controls an Island.) {T}: Target land becomes an Island until end of turn. 2/3 | 
| Pride of Conquerors | 1W | Instant | Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) Creatures you control get +1/+1 until end of turn. If you have the city's blessing, those creatures get +2/+2 until end of turn instead. | 
| Bee-Bee Gun | Artifact — Contraption | Whenever you crank Bee-Bee Gun, until end of turn, target creature gains "{2}: This creature fights another target creature." | |
| Form a Posse | XRW | Sorcery | Create X 1/1 red Mercenary creature tokens with "{T}: Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery." | 
| Success! | W | Instant | Target creature gets +2/+2 until end of turn. If it's a host or has augment, it gains lifelink until end of turn. | 
| Nocturnal Raid | 2BB | Instant | Black creatures get +2/+0 until end of turn. | 
| Might of the Masses | G | Instant | Target creature gets +1/+1 until end of turn for each creature you control. | 
| Scuttling Sliver | 2U | Creature — Sliver Trilobite | Sliver creatures you control have "{2}: Untap this creature." 2/2 |