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 |
|---|---|---|---|
| Krosa | Plane — Dominaria | All creatures get +2/+2. Whenever chaos ensues, you may add {W}{U}{B}{R}{G}. | |
| Carpet of Flowers | G | Enchantment | At the beginning of each of your main phases, if you haven't added mana with this ability this turn, you may add X mana of any one color, where X is the number of Islands target opponent controls. |
| Havoc Demon | 5BB | Creature — Demon | Flying When Havoc Demon dies, all creatures get -5/-5 until end of turn. 5/5 |
| Primal Order | 2GG | Enchantment | At the beginning of each player's upkeep, Primal Order deals damage to that player equal to the number of nonbasic lands they control. |
| Velis Vel | Plane — Lorwyn | Each creature gets +1/+1 for each other creature on the battlefield that shares at least one creature type with it. (For example, if two Elemental Shamans and an Elemental Spirit are on the battlefield, each gets +2/+2.) Whenever chaos ensues, target creature gains all creature types until end of turn. | |
| Iron Will | W | Instant | Target creature gets +0/+4 until end of turn. Cycling {2} ({2}, Discard this card: Draw a card.) |
| Kaervek, the Spiteful | 2BB | Legendary Creature — Human Warlock | Other creatures get -1/-1. 3/2 |
| The Seedcore | Land — Sphere | {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast Phyrexian creature spells. Corrupted — {T}: Target 1/1 creature gets +2/+1 until end of turn. Activate only if an opponent has three or more poison counters. | |
| Mogg Squad | 1R | Creature — Goblin | Mogg Squad gets -1/-1 for each other creature on the battlefield. 3/3 |
| Aegis of the Meek | 3 | Artifact | {1}, {T}: Target 1/1 creature gets +1/+2 until end of turn. |