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 |
|---|---|---|---|
| Moss Diamond | 2 | Artifact | Moss Diamond enters the battlefield tapped. {T}: Add {G}. |
| Mystic Monastery | Land | Mystic Monastery enters the battlefield tapped. {T}: Add {U}, {R}, or {W}. | |
| Nomad Outpost | Land | Nomad Outpost enters the battlefield tapped. {T}: Add {R}, {W}, or {B}. | |
| Ondu Skyruins | Land | Ondu Skyruins enters the battlefield tapped. {T}: Add {W}. | |
| Opulent Palace | Land | Opulent Palace enters the battlefield tapped. {T}: Add {B}, {G}, or {U}. | |
| Orzhov Guildgate | Land — Gate | Orzhov Guildgate enters the battlefield tapped. {T}: Add {W} or {B}. | |
| Pelakka Caverns | Land | Pelakka Caverns enters the battlefield tapped. {T}: Add {B}. | |
| Rakdos Guildgate | Land — Gate | Rakdos Guildgate enters the battlefield tapped. {T}: Add {B} or {R}. | |
| Salt Marsh | Land | Salt Marsh enters the battlefield tapped. {T}: Add {U} or {B}. | |
| Sandsteppe Citadel | Land | Sandsteppe Citadel enters the battlefield tapped. {T}: Add {W}, {B}, or {G}. |