M:tG card similarity search
1U · Artifact — Clue
As Ominous Lockbox enters the battlefield, secretly choose a number between 1 and 20. When an opponent casts a spell with mana value equal to the chosen number, sacrifice Ominous Lockbox. If you do, copy that spell, and you may choose new targets for the copy. {2}, Sacrifice Ominous Lockbox: Draw a card.
| Name | Mana | Type | Text |
|---|---|---|---|
| Standstill | 1U | Enchantment | When a player casts a spell, sacrifice Standstill. If you do, each of that player's opponents draws three cards. |
| 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. |
| Plant Elemental | 1G | Creature — Plant Elemental | When Plant Elemental enters the battlefield, sacrifice it unless you sacrifice a Forest. 3/4 |
| Comet Storm | XRR | Instant | Multikicker {1} (You may pay an additional {1} any number of times as you cast this spell.) Choose any target, then choose another target for each time this spell was kicked. Comet Storm deals X damage to each of them. |
| Kaervek, the Punisher | 1BB | Legendary Creature — Human Warlock | Whenever you commit a crime, exile up to one target black card from your graveyard and copy it. You may cast the copy. If you do, you lose 2 life. (Targeting opponents, anything they control, and/or cards in their graveyards is a crime. Copies of permanent spells become tokens.) 3/3 |
| Rogue Elephant | G | Creature — Elephant | When Rogue Elephant enters the battlefield, sacrifice it unless you sacrifice a Forest. 3/3 |
| Forgotten Lore | G | Sorcery | Target opponent chooses a card in your graveyard. You may pay {G}. If you do, repeat this process except that opponent can't choose a card already chosen for Forgotten Lore. Then put the last chosen card into your hand. |
| Shrouded Lore | B | Sorcery | Target opponent chooses a card in your graveyard. You may pay {B}. If you do, repeat this process except that opponent can't choose a card already chosen for Shrouded Lore. Then put the last chosen card into your hand. |
| 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. |
| Wildfire Devils | 3R | Creature — Devil | When Wildfire Devils enters the battlefield and at the beginning of your upkeep, choose a player at random. That player exiles an instant or sorcery card from their graveyard. Copy that card. You may cast the copy without paying its mana cost. 4/2 |