Rakdos Sacrifice
A Standard deck, by Modified User Name
0th place at a tournament on 2020-04-06

Maindeck:

Artifacts
4 Witch's Oven (Not currently legal in Standard)

Creatures
4 Cauldron Familiar (Not currently legal in Standard)
4 Dreadhorde Butcher (Not currently legal in Standard)
4 Gutterbones (Not currently legal in Standard)
4 Mayhem Devil (Not currently legal in Standard)
4 Midnight Reaper (Not currently legal in Standard)
4 Priest of Forgotten Gods (Not currently legal in Standard)
4 Woe Strider (Not currently legal in Standard)

Legendary Creatures
1 Rankle, Master of Pranks (Not currently legal in Standard)

Sorceries
4 Claim the Firstborn (Not currently legal in Standard)

Basic Lands
5 Mountain
8 Swamp

Lands
4 Blood Crypt (Not currently legal in Standard)
2 Castle Locthwain (Not currently legal in Standard)
4 Fabled Passage (Not currently legal in Standard)

Sideboard:
2 Embereth Shieldbreaker (Not currently legal in Standard)
1 Bedevil (Not currently legal in Standard)
1 Noxious Grasp (Not currently legal in Standard)
2 Pharika's Libation (Not currently legal in Standard)
3 Scorching Dragonfire (Not currently legal in Standard)
3 Act of Treason (Not currently legal in Standard)
3 Agonizing Remorse (Not currently legal in Standard)