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 |
|---|---|---|---|
| Sewer Plague | 2B | Instant | Target creature an opponent controls perpetually gets -2/-2 and gains "At the beginning of each upkeep, this creature perpetually gets -1/-1." |
| Choking Miasma | 1BB | Sorcery | Kicker {G} (You may pay an additional {G} as you cast this spell.) If this spell was kicked, put a +1/+1 counter on a creature you control. All creatures get -2/-2 until end of turn. |
| Obelisk of Alara | 6 | Artifact | {1}{W}, {T}: You gain 5 life. {1}{U}, {T}: Draw a card, then discard a card. {1}{B}, {T}: Target creature gets -2/-2 until end of turn. {1}{R}, {T}: Obelisk of Alara deals 3 damage to target player or planeswalker. {1}{G}, {T}: Target creature gets +4/+4 until end of turn. |
| Elvish Dreadlord | 3BB | Creature — Zombie Elf | Deathtouch When Elvish Dreadlord dies, non-Elf creatures get -3/-3 until end of turn. Encore {5}{B}{B} ({5}{B}{B}, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.) 3/3 |
| Mycosynth Lattice | 6 | Artifact | All permanents are artifacts in addition to their other types. All cards that aren't on the battlefield, spells, and permanents are colorless. Players may spend mana as though it were mana of any color. |
| Charix, the Raging Isle | 2UU | Legendary Creature — Leviathan Crab | Spells your opponents cast that target Charix, the Raging Isle cost {2} more to cast. {3}: Charix gets +X/-X until end of turn, where X is the number of Islands you control. 0/17 |
| Weakstone | 4 | Artifact | Attacking creatures get -1/-0. |
| Stonewood Invocation | 3G | Instant | Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.) Target creature gets +5/+5 and gains shroud until end of turn. (It can't be the target of spells or abilities.) |
| Skyshroud Archer | G | Creature — Elf Archer | {T}: Target creature with flying gets -1/-1 until end of turn. 1/1 |
| Earthbrawn | 1G | Instant | Target creature gets +3/+3 until end of turn. Reinforce 1—{1}{G} ({1}{G}, Discard this card: Put a +1/+1 counter on target creature.) |