M:tG card similarity search
3UU · Instant
Counter target artifact or creature spell. Discover X, where X is that spell's mana value. (Exile cards from the top of your library until you exile a nonland card with that mana value or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)
| Name | Mana | Type | Text |
|---|---|---|---|
| Mana Cannons | 2R | Enchantment | Whenever you cast a multicolored spell, Mana Cannons deals X damage to any target, where X is the number of colors that spell is. |
| Misunderstood Trapeze Elf | Stickers | {TK}{TK} — Whenever you cast a spell, this creature gets +X/+X until end of turn, where X is the amount of generic mana in that spell's mana cost. {TK}{TK}{TK} — Hexproof {TK}{TK} — 4/2 {TK}{TK}{TK}{TK} — 6/6 | |
| Release the Gremlins | XXR | Sorcery | Destroy X target artifacts. Create X 2/2 red Gremlin creature tokens. |
| Chalice of the Void | XX | Artifact | Chalice of the Void enters the battlefield with X charge counters on it. Whenever a player casts a spell with mana value equal to the number of charge counters on Chalice of the Void, counter that spell. |
| Whir of Invention | XUUU | Instant | Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle. |
| Geosurge | RRRR | Sorcery | Add {R}{R}{R}{R}{R}{R}{R}. Spend this mana only to cast artifact or creature spells. |
| Rage Extractor | 4R/P | Artifact | ({R/P} can be paid with either {R} or 2 life.) Whenever you cast a spell with {P} in its mana cost, Rage Extractor deals damage equal to that spell's mana value to any target. |
| Unforgiving One | 2B | Creature — Spirit | Menace (This creature can't be blocked except by two or more creatures.) Whenever Unforgiving One attacks, return target creature card with mana value X or less from your graveyard to the battlefield, where X is the number of modified creatures you control. (Equipment, Auras you control, and counters are modifications.) 2/3 |
| As Foretold | 2U | Enchantment | At the beginning of your upkeep, put a time counter on As Foretold. Once each turn, you may pay {0} rather than pay the mana cost for a spell you cast with mana value X or less, where X is the number of time counters on As Foretold. |
| Etherium Spinner | 2U | Artifact Creature — Human Wizard | Whenever you cast a spell with mana value 4 or greater, create a 1/1 colorless Thopter artifact creature token with flying. 2/1 |