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 |
|---|---|---|---|
| Strength from the Fallen | 1G | Enchantment | Constellation — Whenever Strength from the Fallen or another enchantment enters the battlefield under your control, target creature gets +X/+X until end of turn, where X is the number of creature cards in your graveyard. |
| Rubblebelt Boar | 3R | Creature — Boar | When Rubblebelt Boar enters the battlefield, target creature gets +2/+0 until end of turn. 3/3 |
| Bad Moon | 1B | Enchantment | Black creatures get +1/+1. |
| Clawing Torment | B | Enchantment — Aura | Enchant artifact or creature As long as enchanted permanent is a creature, it gets -1/-1 and can't block. Enchanted permanent has "At the beginning of your upkeep, you lose 1 life." |
| Crosswinds | 1G | Enchantment | Creatures with flying get -2/-0. |
| Bloodtithe Harvester | BR | Creature — Vampire | When Bloodtithe Harvester enters the battlefield, create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this artifact: Draw a card.") {T}, Sacrifice Bloodtithe Harvester: Target creature gets -X/-X until end of turn, where X is twice the number of Blood tokens you control. Activate only as a sorcery. 3/2 |
| Flailing Ogre | 2R | Creature — Ogre | {1}: Flailing Ogre gets +1/+1 until end of turn. Any player may activate this ability. {1}: Flailing Ogre gets -1/-1 until end of turn. Any player may activate this ability. 3/3 |
| Weaselback Redcap | R | Creature — Goblin Knight | {1}{R}: Weaselback Redcap gets +2/+0 until end of turn. 1/1 |
| Blinding Spray | 4U | Instant | Creatures your opponents control get -4/-0 until end of turn. Draw a card. |
| Uncomfortable Chill | 2U | Instant | Creatures your opponents control get -2/-0 until end of turn. Draw a card. |