Grixis Tokens and Recursion with Tymaret, the Murder King and Purphoros, God of the Forge
Meanwhile, in Magical Christmas Land...
T1: Swamp, Bloodsoaked Champion
T2: Mountain, Necromancer's Stockpile attack with Bloodsoaked Champion for 2 damage
T3: Island, Goblin Rabblemaster attack with Bloodsoaked Champion and Goblin token for 3 damage
T4: Swamp, Purphoros, God of the Forge Goblin token enters the battlefield triggering Purphoros for 2 damage. Attack with 2x Goblin tokens, Bloodsoaked Champion and Goblin Rabblemaster for 8 damage.
T5: Swamp, Chasm Skulker Discard Tymaret, the Murder King to Necromancer's Stockpile drawing a card, putting a +1/+1 counter on Chasm Skulker and putting a 2/2 Zombie token into play. Put a 1/1 Goblin token into play, 6 damage from Purphoros, God of the Forge then attack with 3x Goblin tokens, Goblin Rabblemaster and Bloodsoaked Champion for 9 damage.
Now, we can assume that this won't actually happen (aside from the fact that I'd have to be insanely lucky) because the opponent will block/use removal and/or counterspells but anything that goes to the graveyard only fuels Empty the Pits and as long as I still have Purphoros, God of the Forge in play when that resolves the damage dealt from the ETB triggers should do the job.
In the absolute worst case scenario, Purphoros is exiled with Deicide in which case I still have a decent suite of burn spells, removal and aggressive creatures, not to mention the fact that Tymaret, the Murder King + Necromancer's Stockpile is a repeatable card draw engine (discard Tymaret, then sac the resulting Zombie token to return Tymaret to hand and repeat) and attacking with Bloodsoaked Champion then sacrificing him to Tymaret for 2 damage and then paying [[]] to return him back to play and repeating this over and over again is also a thing.
