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 |
|---|---|---|---|
| Boros Guildgate | Land — Gate | Boros Guildgate enters the battlefield tapped. {T}: Add {R} or {W}. | |
| Charcoal Diamond | 2 | Artifact | Charcoal Diamond enters the battlefield tapped. {T}: Add {B}. |
| Cinder Barrens | Land | Cinder Barrens enters the battlefield tapped. {T}: Add {B} or {R}. | |
| Coastal Tower | Land | Coastal Tower enters the battlefield tapped. {T}: Add {W} or {U}. | |
| Crumbling Necropolis | Land | Crumbling Necropolis enters the battlefield tapped. {T}: Add {U}, {B}, or {R}. | |
| Dimir Guildgate | Land — Gate | Dimir Guildgate enters the battlefield tapped. {T}: Add {U} or {B}. | |
| Elfhame Palace | Land | Elfhame Palace enters the battlefield tapped. {T}: Add {G} or {W}. | |
| Enchanted Prairie | Enchantment Land | Enchanted Prairie enters the battlefield tapped. {T}: Add {W} or {U}. | |
| Fire Diamond | 2 | Artifact | Fire Diamond enters the battlefield tapped. {T}: Add {R}. |
| Forsaken Sanctuary | Land | Forsaken Sanctuary enters the battlefield tapped. {T}: Add {W} or {B}. |