Mardu Sacrifice
A Standard deck, by Cory Purr
4th place at a tournament in Homestead, Pennsylvania, United States on 2020-02-15
As reported at http://www.starcitygames.com

Maindeck:

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

Creatures
4 Cauldron Familiar (Not currently legal in Standard)
4 Cruel Celebrant (Not currently legal in Standard)
3 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)
3 Woe Strider (Not currently legal in Standard)

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

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

Basic Lands
1 Mountain
1 Plains
3 Swamp

Lands
4 Blood Crypt (Not currently legal in Standard)
3 Castle Locthwain (Not currently legal in Standard)
3 Fabled Passage (Not currently legal in Standard)
4 Godless Shrine (Not currently legal in Standard)
4 Sacred Foundry (Not currently legal in Standard)
1 Temple of Malice (Not currently legal in Standard)

Sideboard:
2 Sorcerous Spyglass (Not currently legal in Standard)
3 Unchained Berserker (Not currently legal in Standard)
3 Despark (Not currently legal in Standard)
3 Duress
3 Epic Downfall (Not currently legal in Standard)
1 Legion's End (Not currently legal in Standard)