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 |
|---|---|---|---|
| Gauntlet of Might | 4 | Artifact | Red creatures get +1/+1. Whenever a Mountain is tapped for mana, its controller adds an additional {R}. |
| Bubbling Muck | B | Sorcery | Until end of turn, whenever a player taps a Swamp for mana, that player adds an additional {B}. |
| High Tide | U | Instant | Until end of turn, whenever a player taps an Island for mana, that player adds an additional {U}. |
| Naked Singularity | 5 | Artifact | Cumulative upkeep {3} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) If tapped for mana, Plains produce {R}, Islands produce {G}, Swamps produce {W}, Mountains produce {U}, and Forests produce {B} instead of any other type. |
| Reality Twist | UUU | Enchantment | Cumulative upkeep {1}{U}{U} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) If tapped for mana, Plains produce {R}, Swamps produce {G}, Mountains produce {W}, and Forests produce {B} instead of any other type. |
| Pale Moon | 1U | Instant | Until end of turn, if a player taps a nonbasic land for mana, it produces colorless mana instead of any other type. |
| Dead of Winter | 2B | Sorcery | All nonsnow creatures get -X/-X until end of turn, where X is the number of snow permanents you control. |
| Ritual of Subdual | 4GG | Enchantment | Cumulative upkeep {2} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) If a land is tapped for mana, it produces colorless mana instead of any other type. |
| Olivia's Wrath | 4B | Sorcery | Each non-Vampire creature gets -X/-X until end of turn, where X is the number of Vampires you control. |
| Terror Tide | 2BB | Sorcery | Fathomless descent — All creatures get -X/-X until end of turn, where X is the number of permanent cards in your graveyard. |