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 |
|---|---|---|---|
| Foul Orchard | Land | Foul Orchard enters the battlefield tapped. {T}: Add {B} or {G}. | |
| Frontier Bivouac | Land | Frontier Bivouac enters the battlefield tapped. {T}: Add {G}, {U}, or {R}. | |
| Frost Marsh | Snow Land | Frost Marsh enters the battlefield tapped. {T}: Add {U} or {B}. | |
| Glasspool Shore | Land | Glasspool Shore enters the battlefield tapped. {T}: Add {U}. | |
| Golgari Guildgate | Land — Gate | Golgari Guildgate enters the battlefield tapped. {T}: Add {B} or {G}. | |
| Gruul Guildgate | Land — Gate | Gruul Guildgate enters the battlefield tapped. {T}: Add {R} or {G}. | |
| Hagra Broodpit | Land | Hagra Broodpit enters the battlefield tapped. {T}: Add {B}. | |
| Highland Lake | Land | Highland Lake enters the battlefield tapped. {T}: Add {U} or {R}. | |
| Highland Weald | Snow Land | Highland Weald enters the battlefield tapped. {T}: Add {R} or {G}. | |
| Izzet Guildgate | Land — Gate | Izzet Guildgate enters the battlefield tapped. {T}: Add {U} or {R}. |