M:tG card similarity search
| Name | Mana | Type | Text | 
|---|---|---|---|
| Sickening Shoal | XBB | Instant — Arcane | You may exile a black card with mana value X from your hand rather than pay this spell's mana cost. Target creature gets -X/-X until end of turn. | 
| Black Sun's Twilight | XB | Instant | Up to one target creature gets -X/-X until end of turn. If X is 5 or more, return a creature card with mana value X or less from your graveyard to the battlefield tapped. | 
| Soul Enervation | 3B | Enchantment | Flash When Soul Enervation enters the battlefield, target creature gets -4/-4 until end of turn. Whenever one or more creature cards leave your graveyard, each opponent loses 1 life and you gain 1 life. | 
| Induce Despair | 2B | Instant | As an additional cost to cast this spell, reveal a creature card from your hand. Target creature gets -X/-X until end of turn, where X is the revealed card's mana value. | 
| Mirkwood Trapper | 1GU | Creature — Elf Scout | Whenever a player attacks you, target attacking creature gets -2/-0 until end of turn. Whenever a player attacks, if they aren't attacking you, that player chooses an attacking creature. It gets +2/+0 until end of turn. 1/4 | 
| Subtle Strike | 1B | Instant | Choose one or both — • Target creature gets -1/-1 until end of turn. • Put a +1/+1 counter on target creature. | 
| Umezawa's Charm | 1B | Instant | Choose one — • Target creature gets +2/+2 until end of turn. • Target creature gets -1/-1 until end of turn. • You gain 2 life. | 
| Crippling Fear | 2BB | Sorcery | Choose a creature type. Creatures that aren't of the chosen type get -3/-3 until end of turn. | 
| Code of Constraint | 2U | Instant | Target creature gets -4/-0 until end of turn. Draw a card. Addendum — If you cast this spell during your main phase, tap that creature and it doesn't untap during its controller's next untap step. | 
| Lethargy Trap | 3U | Instant — Trap | If three or more creatures are attacking, you may pay {U} rather than pay this spell's mana cost. Attacking creatures get -3/-0 until end of turn. |