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 |
|---|---|---|---|
| Arcane Subtraction | 1U | Instant | Target creature gets -4/-0 until end of turn. Learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.) |
| Collective Nightmare | 2B | Instant | Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Target creature gets -3/-3 until end of turn. |
| Death Wind | XB | Instant | Target creature gets -X/-X until end of turn. |
| Demon's Grasp | 4B | Sorcery | Target creature gets -5/-5 until end of turn. |
| Disfigure | B | Instant | Target creature gets -2/-2 until end of turn. |
| Dismember | 1B/PB/P | Instant | ({B/P} can be paid with either {B} or 2 life.) Target creature gets -5/-5 until end of turn. |
| Disorient | 3U | Instant | Target creature gets -7/-0 until end of turn. |
| Fatal Fumes | 3B | Instant | Target creature gets -4/-2 until end of turn. |
| Flatten | 3B | Instant | Target creature gets -4/-4 until end of turn. |
| Puny Snack | 2B | Instant — Adventure | Target creature gets -2/-2 until end of turn. (Then exile this card. You may cast the creature later from exile.) |