M:tG card similarity search
2BR · Enchantment
At the beginning of your upkeep, choose an opponent at random. Exile the top card of that player's library. Until end of turn, you may play that card and you may spend mana as though it were mana of any color to cast it. When you cast a spell this way, its owner loses life equal to its mana value.
| Name | Mana | Type | Text |
|---|---|---|---|
| Secret Base | Land | {T}: Add {C}. {T}: Add one mana of any color. Spend this mana only to cast a spell that shares a watermark with Secret Base. | |
| Abbot of Keral Keep | 1R | Creature — Human Monk | Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) When Abbot of Keral Keep enters the battlefield, exile the top card of your library. Until end of turn, you may play that card. 2/1 |
| Metamorphosis | G | Sorcery | As an additional cost to cast this spell, sacrifice a creature. Add X mana of any one color, where X is 1 plus the sacrificed creature's mana value. Spend this mana only to cast creature spells. |
| Altar of the Lost | 3 | Artifact | Altar of the Lost enters the battlefield tapped. {T}: Add two mana in any combination of colors. Spend this mana only to cast spells with flashback from a graveyard. |
| Shadow of the Enemy | 3BBB | Sorcery | Exile all creature cards from target player's graveyard. You may cast spells from among those cards for as long as they remain exiled, and mana of any type can be spent to cast them. |
| Tasha's Hideous Laughter | 1UU | Sorcery | Each opponent exiles cards from the top of their library until that player has exiled cards with total mana value 20 or more. |
| Villainous Wealth | XBGU | Sorcery | Target opponent exiles the top X cards of their library. You may cast any number of spells with mana value X or less from among them without paying their mana costs. |
| Sifter Wurm | 5GG | Creature — Wurm | Trample When Sifter Wurm enters the battlefield, scry 3, then reveal the top card of your library. You gain life equal to that card's mana value. 7/7 |
| Nightveil Specter | U/BU/BU/B | Creature — Specter | Flying Whenever Nightveil Specter deals combat damage to a player, that player exiles the top card of their library. You may play lands and cast spells from among cards exiled with Nightveil Specter. 2/3 |
| Mindleecher | 4BB | Creature — Nightmare | Mutate {4}{B} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.) Flying Whenever this creature mutates, exile the top card of each opponent's library face down. You may look at and play those cards for as long as they remain exiled. 5/5 |