M:tG card similarity search
2B · Legendary Creature — Human Ninja
Whenever you cast an enchantment spell, if you don't control a creature named Keimi, create Keimi, a legendary 3/3 black and green Frog creature token with "Whenever you cast an enchantment spell, each opponent loses 1 life and you gain 1 life." {1}{G/U}: Tatsunari, Toad Rider and target Frog you control can't be blocked this turn except by creatures with flying or reach. 3/3
| Name | Mana | Type | Text | 
|---|---|---|---|
| Sol'kanar the Swamp King | 2UBR | Legendary Creature — Demon | Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) Whenever a player casts a black spell, you gain 1 life. 5/5 | 
| Lurking Spinecrawler | 3B | Creature — Horror | When Lurking Spinecrawler enters the battlefield, you may choose a nonland card in your hand. If you do, that card perpetually incorporates {1}{B} and gains "When you cast this spell, each opponent sacrifices a creature. Each opponent who can't discards a card." Whenever you cast a multicolored spell, for each of that spell's colors, each opponent loses 1 life and you gain 1 life. 5/4 | 
| Student of Ojutai | 3W | Creature — Human Monk | Whenever you cast a noncreature spell, you gain 2 life. 2/4 | 
| Faerie Tauntings | 2B | Tribal Enchantment — Faerie | Whenever you cast a spell during an opponent's turn, you may have each opponent lose 1 life. | 
| Scheming Aspirant | 1B | Creature — Phyrexian Advisor | Whenever you proliferate, each opponent loses 2 life and you gain 2 life. 1/3 | 
| Rusko, Clockmaker | 2UB | Legendary Creature — Human Artificer | When Rusko, Clockmaker enters the battlefield, conjure a card named Midnight Clock onto the battlefield. Whenever you cast a noncreature spell, put an hour counter on each permanent you control named Midnight Clock. Each opponent loses 1 life and you gain 1 life. 3/3 | 
| A-Cauldron Familiar | B | Creature — Cat | A-Cauldron Familiar can't block. When Cauldron Familiar enters the battlefield, each opponent loses 1 life and you gain 1 life. Sacrifice a Food: Return Cauldron Familiar from your graveyard to the battlefield. 1/1 | 
| Curse of Fool's Wisdom | 4BB | Enchantment — Aura Curse | Enchant player Whenever enchanted player draws a card, they lose 2 life and you gain 2 life. Madness {3}{B} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.) | 
| Qarsi Sadist | 1B | Creature — Human Cleric | Exploit (When this creature enters the battlefield, you may sacrifice a creature.) When Qarsi Sadist exploits a creature, target opponent loses 2 life and you gain 2 life. 1/3 | 
| Doomskar Oracle | 2W | Creature — Human Cleric | Whenever you cast your second spell each turn, you gain 2 life. Foretell {W} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.) 3/2 |