M:tG card similarity search
UU · Enchantment
Whenever an opponent casts a spell, you may reveal the top card of your library. If you do, counter that spell if it has the same mana value as the revealed card.
| Name | Mana | Type | Text |
|---|---|---|---|
| Selvala's Enforcer | 3G | Creature — Elf Warrior | Parley — When Selvala's Enforcer enters the battlefield, each player reveals the top card of their library. For each nonland card revealed this way, put a +1/+1 counter on Selvala's Enforcer. Then each player draws a card. 2/2 |
| Xanathar, Guild Kingpin | 4UB | Legendary Creature — Beholder | At the beginning of your upkeep, choose target opponent. Until end of turn, that player can't cast spells, you may look at the top card of their library any time, you may play the top card of their library, and you may spend mana as though it were mana of any color to cast spells this way. 5/6 |
| Mulch | 1G | Sorcery | Reveal the top four cards of your library. Put all land cards revealed this way into your hand and the rest into your graveyard. |
| Baneful Omen | 4BBB | Enchantment | At the beginning of your end step, you may reveal the top card of your library. If you do, each opponent loses life equal to that card's mana value. |
| Friendly Fire | 3R | Instant | Target creature's controller reveals a card at random from their hand. Friendly Fire deals damage to that creature and that player equal to the revealed card's mana value. |
| Mass Polymorph | 5U | Sorcery | Exile all creatures you control, then reveal cards from the top of your library until you reveal that many creature cards. Put all creature cards revealed this way onto the battlefield, then shuffle the rest of the revealed cards into your library. |
| Living Breakthrough | Enchantment Creature — Moonfolk | Flying Whenever you cast a spell, your opponents can't cast spells with the same mana value as that spell until your next turn. 3/3 | |
| Xander's Pact | 4BB | Sorcery | Casualty 2 (As you cast this spell, you may sacrifice a creature with power 2 or greater. When you do, copy this spell.) Each opponent exiles the top card of their library. You may cast spells from among those cards this turn. If you cast a spell this way, pay life equal to that spell's mana value rather than pay its mana cost. |
| Mirrored Depths | Plane — Karsus | Whenever a player casts a spell, that player flips a coin. If the player loses the flip, counter that spell. Whenever chaos ensues, target player reveals the top card of their library. If it's a nonland card, you may cast it without paying its mana cost. | |
| Temporal Aperture | 2 | Artifact | {5}, {T}: Shuffle your library, then reveal the top card. Until end of turn, for as long as that card remains on top of your library, play with the top card of your library revealed and you may play that card without paying its mana cost. (If it has X in its mana cost, X is 0.) |