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 |
|---|---|---|---|
| Theater of Horrors | 1BR | Enchantment | At the beginning of your upkeep, exile the top card of your library. During your turn, if an opponent lost life this turn, you may play lands and cast spells from among cards exiled with Theater of Horrors. {3}{R}: Theater of Horrors deals 1 damage to target opponent or planeswalker. |
| Duskmantle Seer | 2UB | Creature — Vampire Wizard | Flying At the beginning of your upkeep, each player reveals the top card of their library, loses life equal to that card's mana value, then puts it into their hand. 4/4 |
| Titans' Nest | 1BGU | Enchantment | At the beginning of your upkeep, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.) Exile a card from your graveyard: Add {C}. Spend this mana only to cast a spell that's one or more colors without {X} in its mana cost. |
| Rassilon, the War President | 3UB | Legendary Creature — Time Lord Noble | At the beginning of your upkeep, you lose 2 life and exile the top card of your library. You may play that card for as long as it remains exiled. Each noncreature spell you cast from exile has conspire. (As you cast that spell, you may tap two untapped creatures you control that share a color with it. When you do, copy it and you may choose new targets for the copy.) 3/4 |
| Hidetsugu, Devouring Chaos | 3B | Legendary Creature — Ogre Demon | {B}, Sacrifice a creature: Scry 2. {2}{R}, {T}: Exile the top card of your library. You may play that card this turn. When you exile a nonland card this way, Hidetsugu, Devouring Chaos deals damage equal to the exiled card's mana value to any target. 4/4 |
| Five-Finger Discount | 4UU | Sorcery | Put target nonland permanent into your hand. You may spend mana as though it were mana of any color the next time you cast that card. |
| Ominous Traveler | 2 | Creature — Human | When Ominous Traveler enters the battlefield, draft a card from Ominous Traveler's spellbook. That card perpetually gains "You may spend mana as though it were mana of any color to cast this spell" and "When you cast this spell, return a creature named Ominous Traveler you control to its owner's hand." 1/1 |
| Dark Tutelage | 2B | Enchantment | At the beginning of your upkeep, reveal the top card of your library and put that card into your hand. You lose life equal to its mana value. |
| False Dawn | 1W | Sorcery | Until end of turn, spells and abilities you control that would add colored mana instead add that much white mana. Until end of turn, you may spend white mana as though it were mana of any color. Draw a card. |
| Brilliant Ultimatum | WWUUUBB | Sorcery | Exile the top five cards of your library. An opponent separates those cards into two piles. You may play lands and cast spells from one of those piles. If you cast a spell this way, you cast it without paying its mana cost. |