M:tG card similarity search
2U · World Enchantment
Whenever a player casts an instant spell, counter it unless that player pays {X}, where X is its mana value.
| Name | Mana | Type | Text |
|---|---|---|---|
| Aria of Flame | 2R | Enchantment | When Aria of Flame enters the battlefield, each opponent gains 10 life. Whenever you cast an instant or sorcery spell, put a verse counter on Aria of Flame, then it deals damage equal to the number of verse counters on it to target player or planeswalker. |
| Venarian Glimmer | XU | Instant | Target player reveals their hand. You choose a nonland card with mana value X or less from it. That player discards that card. |
| Calamity of the Titans | 4CC | Sorcery | As an additional cost to cast this spell, reveal a colorless creature card from your hand. Exile each creature and planeswalker with mana value less than the revealed card's mana value. |
| Collective Voyage | G | Sorcery | Join forces — Starting with you, each player may pay any amount of mana. Each player searches their library for up to X basic land cards, where X is the total amount of mana paid this way, puts them onto the battlefield tapped, then shuffles. |
| Managorger Hydra | 2G | Creature — Hydra | Trample Whenever a player casts a spell, put a +1/+1 counter on Managorger Hydra. 1/1 |
| Extinction Event | 3B | Sorcery | Choose odd or even. Exile each creature with mana value of the chosen quality. (Zero is even.) |
| Reasonable Doubt | 1U | Instant | Counter target spell unless its controller pays {2}. Suspect up to one target creature. (A suspected creature has menace and can't block.) |
| Thought Prison | 5 | Artifact | Imprint — When Thought Prison enters the battlefield, you may have target player reveal their hand. If you do, choose a nonland card from it and exile that card. Whenever a player casts a spell that shares a color or mana value with the exiled card, Thought Prison deals 2 damage to that player. |
| High Tide | U | Instant | Until end of turn, whenever a player taps an Island for mana, that player adds an additional {U}. |
| Thing in the Ice | 1U | Creature — Horror | Defender Thing in the Ice enters the battlefield with four ice counters on it. Whenever you cast an instant or sorcery spell, remove an ice counter from Thing in the Ice. Then if it has no ice counters on it, transform it. 0/4 |