Korvold, Fae-Cursed King + Surly Badgersaur + Dakmor Salvage + Putrid Imp

Korvold, Fae-Cursed King

Surly Badgersaur

Dakmor Salvage

Putrid Imp

How it works

1. Activate Putrid Imp by discarding Dakmor Salvage.
2. Surly Badgersaur's second ability triggers, creating a Treasure token.
3. Resolve the Putrid Imp ability, giving it flying until end of turn.
4. Activate the Treasure token by tapping and sacrificing it, adding one mana of any color.
5. Korvold's second ability triggers, putting a +1/+1 counter on it and causing you to mill two cards and return Dakmor Salvage from your graveyard to your hand.
6. Repeat.