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 |
|---|---|---|---|
| Great Hall of the Citadel | Land | {T}: Add {C}. {1}, {T}: Add two mana in any combination of colors. Spend this mana only to cast legendary spells. | |
| Karplusan Giant | 6R | Creature — Giant | Tap an untapped snow land you control: Karplusan Giant gets +1/+1 until end of turn. 3/3 |
| Sunforger | 3 | Artifact — Equipment | Equipped creature gets +4/+0. {R}{W}, Unattach Sunforger: Search your library for a red or white instant card with mana value 4 or less and cast that card without paying its mana cost. Then shuffle. Equip {3} |
| Gift Horse | Artifact — Contraption | Whenever you crank Gift Horse, roll two six-sided dice. Create a number of 1/1 red Goblin creature tokens equal to the difference between those results. | |
| Abandoned Outpost | Land | Abandoned Outpost enters the battlefield tapped. {T}: Add {W}. {T}, Sacrifice Abandoned Outpost: Add one mana of any color. | |
| Bog Wreckage | Land | Bog Wreckage enters the battlefield tapped. {T}: Add {B}. {T}, Sacrifice Bog Wreckage: Add one mana of any color. | |
| Ravaged Highlands | Land | Ravaged Highlands enters the battlefield tapped. {T}: Add {R}. {T}, Sacrifice Ravaged Highlands: Add one mana of any color. | |
| Seafloor Debris | Land | Seafloor Debris enters the battlefield tapped. {T}: Add {U}. {T}, Sacrifice Seafloor Debris: Add one mana of any color. | |
| Timberland Ruins | Land | Timberland Ruins enters the battlefield tapped. {T}: Add {G}. {T}, Sacrifice Timberland Ruins: Add one mana of any color. | |
| Johtull Wurm | 5G | Creature — Wurm | Whenever Johtull Wurm becomes blocked, it gets -2/-1 until end of turn for each creature blocking it beyond the first. 6/6 |