Cabezadebolo reached rank #8 on Mythic with this deck. You can check his stream here.

Companion
1
Lurrus of the Dream-Den
Creatures (26)
2
Archfiend's Vessel
4
Cauldron Familiar
4
Gutterbones
2
Knight of the Ebon Legion
4
Dreadhorde Butcher
2
Fiend Artisan
4
Priest of Forgotten Gods
4
Robber of the Rich
Spells (8)
4
Claim the Firstborn
4
Call of the Death-Dweller
Artifacts (4)
4
Witch's Oven
Lands (22)
4
Blood Crypt
2
Castle Locthwain
1
Mountain
4
Sacred Foundry
2
Stomping Ground
8
Swamp
1
Temple of Malice
Cards (60)
Sideboard (15)
1
Blightbeetle
1
Eliminate
2
Embereth Shieldbreaker
2
Noxious Grasp
1
Tymaret, Chosen from Death
1
Act of Treason
2
Drill Bit
1
Lurrus of the Dream-Den
4
Mayhem Devil