Black/Red
Creatures:
Underrealm Lich(M)
Blood Operative(R)
Lazav, the Multifarious(M)
Spells:
Demolish(UC)
Price of Fame(UC)
Deadly Visit(C)
Connive/Concot(R)
Dark Petition(R)
Supports:
(Interchangeable with anything really)
Rupture Spire(UC)
Sarkhan’s Unsealing(R)
Nothing stays down for long because they will keep coming back in the form of Operative/Concot/Petition/. Summon for cheap for half mana with Lazav. Cheap summons with 8/9 mana, creatures with a cost of 15/14/10 with Concot/Petition. Each Operative that comes back does 4 damage to any creature or the opponent with Unsealing with a bonus of 4 dmg to everything across the board with Lich.
I suggest using it more with Bolas2 so his 1 ability draws more to activate Lichs passive to put more cards in the graveyard. Thinking of removing Sarkhan’s Unsealing for Beacon Bolt(UC). Some more control with either BloodSun(R) or Alpine Moon(R) . Font of Agonies(UC) or Consecrate/Consume[UC](for hexproofs).
Edit: Added rarity next to cards.