Ravenous Rats [Invasion] Shadows over Innistrad Set: Stronghold Type: Creature —

Set: Stronghold Type: Creature — Thrull Common Cost: {2}{B} Sacrifice Morgue Thrull: Put the top three cards of your library into your graveyard

(A source with wither deals damage to creatures in the form of -1/-1 counters

Set: Commander 2018 Type: Sorcery Rare Cost: {X}{B}{B}{G} Destroy each nonland permanent with converted mana cost X or less

Reality even more so

Set: Gatecrash Type: Creature — Shark Crab Rarity: Common Cost: {G}{U} Flash (You may cast this spell any time you could cast an instant

Ravenous Rats [Invasion] Shadows over Innistrad Set: Stronghold Type: Creature —Set: Invasion Type: Creature Rat Common Cost: {1}{B} When Ravenous Rats enters the battlefield, target opponent discards a card. Nothing is sacred to the rats. Everything is simply another meal.