B/R deck where you use your opponent's creatures to fuel your own fires! Use your opponent's creatures against them in combat, and then instead of giving them back, sacrifice them.
This deck opted for infinite-use outlets (Furnaces), as opposed to using single-use cards like Fling. Each interaction this deck makes requires both a Fuel card and a Furnace card; permanent, multi-use cards like Smelt-Ward Ignus and Priest of Forgotten Gods are key to making the interaction consistent enough.
Support from Gutterbones and Reassembling Skeleton ensure you'll always have something to sacrifice and muck up the field against aggro decks, all the while being cheered on by Judith, the Scourge Diva pings.
1. Get a Furnace out on the field
Dark-Dweller Oracle | Priest of Forgotten Gods
2. Use Fuel to take control of an opponent's creature
Smelt-Ward Ignus | Hijack | Act of Treason
*I only want to use Fuel on a turn where I can also sacrifice the creature in a Furnace. Turn 4 is the earliest turn I can do this.
3. Attack with stolen creature
4. Fuel your Furnace with the stolen creature
*Aim to cast Demon of Catastrophes on turn 4 or 5 despite not being able to use the opponent's creature as sacrifice until turn 7; it absolutely demands your opponent's removal, and reaches near-Spawn of Mayhem levels of power in this deck
5. Profit
This is the most important step. You need to make sure that everyone in the room knows you're a complete badass and that you make money from all that sadistic value
