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 |
|---|---|---|---|
| Phyrexian Boon | 2B | Enchantment — Aura | Enchant creature Enchanted creature gets +2/+1 as long as it's black. Otherwise, it gets -1/-2. |
| Teferi's Realm | 1UU | World Enchantment | At the beginning of each player's upkeep, that player chooses artifact, creature, land, or non-Aura enchantment. All nontoken permanents of that type phase out. (While they're phased out, they're treated as though they don't exist. Each one phases in before its controller untaps during their next untap step.) |
| Silumgar, the Drifting Death | 4UB | Legendary Creature — Dragon | Flying, hexproof Whenever a Dragon you control attacks, creatures defending player controls get -1/-1 until end of turn. 3/7 |
| Ulrich of the Krallenhorde | 3RG | Legendary Creature — Human Werewolf | Whenever this creature enters the battlefield or transforms into Ulrich of the Krallenhorde, target creature gets +4/+4 until end of turn. At the beginning of each upkeep, if no spells were cast last turn, transform Ulrich of the Krallenhorde. 4/4 |
| Siege Striker | 2W | Creature — Human Soldier | Double strike (This creature deals both first-strike and regular combat damage.) Whenever Siege Striker attacks, you may tap any number of untapped creatures you control. Siege Striker gets +1/+1 until end of turn for each creature tapped this way. 1/1 |
| Viscid Lemures | 4B | Creature — Spirit | {0}: Viscid Lemures gets -1/-0 and gains swampwalk until end of turn. (It can't be blocked as long as defending player controls a Swamp.) 4/3 |
| Elvish Guidance | 2G | Enchantment — Aura | Enchant land Whenever enchanted land is tapped for mana, its controller adds an additional {G} for each Elf on the battlefield. |
| Order of the Alabaster Host | Creature — Phyrexian Knight | Whenever Order of the Alabaster Host becomes blocked by a creature, that creature gets -1/-1 until end of turn. 3/3 | |
| B-I-N-G-O | 1G | Creature — Dog | Trample Whenever a player casts a spell, put a chip counter on its mana value. B-I-N-G-O gets +9/+9 for each set of three numbers in a row with chip counters on them. 1/1 |
| Primalcrux | GGGGGG | Creature — Elemental | Trample Chroma — Primalcrux's power and toughness are each equal to the number of green mana symbols in the mana costs of permanents you control. */* |