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 |
|---|---|---|---|
| Night of Souls' Betrayal | 2BB | Legendary Enchantment | All creatures get -1/-1. |
| Cabal Patriarch | 3BBB | Legendary Creature — Human Wizard | {2}{B}, Sacrifice a creature: Target creature gets -2/-2 until end of turn. {2}{B}, Exile a creature card from your graveyard: Target creature gets -2/-2 until end of turn. 5/5 |
| Bog Naughty | 3BB | Creature — Faerie | Flying {2}{B}, Sacrifice a Food: Target creature gets -3/-3 until end of turn. 3/3 |
| Hazardous Conditions | 2BG | Sorcery | Creatures with no counters on them get -2/-2 until end of turn. |
| For the Family | G | Instant | Target creature gets +2/+2 until end of turn. If you control four or more creatures, that creature gets +4/+4 until end of turn instead. |
| Daru Encampment | Land | {T}: Add {C}. {W}, {T}: Target Soldier creature gets +1/+1 until end of turn. | |
| Drana's Silencer | 5B | Creature — Vampire Rogue | When Drana's Silencer enters the battlefield, target creature an opponent controls gets -X/-X until end of turn, where X is the number of creatures in your party. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.) 3/2 |
| Bile Blight | BB | Instant | Target creature and all other creatures with the same name as that creature get -3/-3 until end of turn. |
| Echoing Decay | 1B | Instant | Target creature and all other creatures with the same name as that creature get -2/-2 until end of turn. |
| Sword Dancer | 1W | Creature — Human Rebel | {W}{W}: Target attacking creature gets -1/-0 until end of turn. 1/2 |