Darkrai's passive ability deals free damage to sleeping Pokmon, which both keeps the Pokmon from attacking, and deals damage
It isnt reprinted enough in main sets, only once in Commander Legends as a mythic

Creature (30) 1x Bloodgift Demon 1x Boneknitter 1x Cemetery Reaper 1x Corpse Harvester 1x Cryptbreaker 1x Diregraf Captain 1x Doomed Dissenter 1x Drunau Corpse Trawler 1x Fate Unraveler 1x Ghoulcaller Gisa 1x Gisa and Geralf 1x Grave Titan 1x Gravecrawler 1x Gravespawn Sovereign 1x Havengul Runebinder 1x Kami of the Crescent Moon 1x Lim-Dul the Necromancer 1x Lord of the Accursed 1x Lord of the Undead 1x Master of the Feast 1x Metathran Zombie 1x Noosegraf Mob 1x Risen Executioner 1x Tomorrow, Azami's Familiar 1x Typhoid Rats 1x Unbreathing Horde 1x Undead Warchief 1x Vengeful Dead 1x Xathrid Necromancer 1x Zombie Master Sorcery (6) Land (31) 1x Akoum Refuge 1x Blighted Fen 1x Bloodfell Caves 1x Command Tower 1x Darksteel Citadel 1x Dismal Backwater 1x Evolving Wilds 1x Field of Ruin 1x Foreboding Ruins 1x Holdout Settlement 1x Inventors' Fair 3x Island 1x Mirrorpool 1x Mortuary Mire 2x Mountain 1x Quicksand 1x Rakdos Guildgate 1x Rocky Tar Pit 1x Scavenger Grounds 1x Shimmering Grotto 1x Shrine of the Forsaken Gods 4x Swamp 1x Swiftwater Cliffs 1x Temple of Epiphany 1x Unknown Shores Artifact (8) Commander (1) Enchantment (21) 1x Archmage Ascension 1x Breathstealer's Crypt 1x Call to the Grave 1x Corpseweft 1x Dictate of Erebos 1x Dictate of Kruphix 1x Dire Undercurrents 1x Endless Ranks of the Dead 1x Fevered Visions 1x Forced Fruition 1x Graf Harvest 1x Grave Betrayal 1x Grave Pact 1x Liliana's Mastery 1x Phyrexian Tyranny 1x Price of Knowledge 1x Propaganda 1x Quest for the Gravelord 1x Rooftop Storm 1x Spiteful Visions 1x Underworld Dreams

Coupled with cards like Aggravated Assault, Haste enablers, and the Welders, it can do very silly things, and if you suit it up (potentially even with Assault Suit it can be fairly aggressive and above-rate
Agree or disagree
Credit: Wizards of the Coast Hecteyes BPhillipYork: Well, this is solid, and basically just an ooze horror version of a rat, but having several of these is pretty solid, and this definitely breaks parity if you're trying to play that well, but is mostly to be used if you've got ways to benefit from people discarding like Waste Not, or to punish them