M:tG card similarity search
3R · Enchantment
At the beginning of each upkeep, count the number of permanents. If the number is odd, until end of turn, red creatures get +1/+1 and whenever a player taps a Mountain for mana, that player adds an additional {R}. If the number is even, until end of turn, red creatures get -1/-1 and if a player taps a Mountain for mana, that Mountain produces colorless mana instead of any other type.
| Name | Mana | Type | Text |
|---|---|---|---|
| Plagued Rusalka | B | Creature — Spirit | {B}, Sacrifice a creature: Target creature gets -1/-1 until end of turn. 1/1 |
| Frankie Peanuts | 2WW | Legendary Creature — Elephant Rogue | At the beginning of your upkeep, you may ask target player a yes-or-no question. If you do, that player answers the question truthfully and abides by that answer if able until end of turn. 2/3 |
| Basilisk Gate | Land — Gate | {T}: Add {C}. {2}, {T}: Target creature gets +X/+X until end of turn, where X is the number of Gates you control. Activate only as a sorcery. | |
| Wasteland Strangler | 2B | Creature — Eldrazi Processor | Devoid (This card has no color.) When Wasteland Strangler enters the battlefield, you may put a card an opponent owns from exile into that player's graveyard. If you do, target creature gets -3/-3 until end of turn. 3/2 |
| Flaying Tendrils | 1BB | Sorcery | Devoid (This card has no color.) All creatures get -2/-2 until end of turn. If a creature would die this turn, exile it instead. |
| Aphetto Exterminator | 2B | Creature — Human Wizard | Morph {3}{B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When Aphetto Exterminator is turned face up, target creature gets -3/-3 until end of turn. 3/1 |
| Dwarven Bloodboiler | RRR | Creature — Dwarf | Tap an untapped Dwarf you control: Target creature gets +2/+0 until end of turn. 2/2 |
| Barbed Batterfist | 1R | Artifact — Equipment | For Mirrodin! (When this Equipment enters the battlefield, create a 2/2 red Rebel creature token, then attach this to it.) Equipped creature gets +1/-1. Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.) |
| Nim Replica | 3 | Artifact Creature — Zombie | {2}{B}, Sacrifice Nim Replica: Target creature gets -1/-1 until end of turn. 3/1 |
| Ceta Disciple | U | Creature — Merfolk Wizard | {R}, {T}: Target creature gets +2/+0 until end of turn. {G}, {T}: Add one mana of any color. 1/1 |