Mikaeus, the Unhallowed + Blasting Station + Morselhoarder

Mikaeus, the Unhallowed

Blasting Station

Morselhoarder

How it works

1. Activate Blasting Station by tapping it and sacrificing Morselhoarder.
2. When Morselhoarder dies, its undying ability triggers, returning it from your graveyard to the battlefield without a +1/+1 counter on it due to its replacement effect.
3. When Morselhoarder enters, Blasting Station triggers, untapping Blasting Station.
4. Resolve the Blasting Station ability from step 1.
5. Repeat.

This loop is a masterclass in turning negative counters into infinite power, anchored entirely by Mikaeus, the Unhallowed granting undying to your non-Human creatures. When you sacrifice Morselhoarder to Blasting Station, Mikaeus brings it right back to the battlefield; because Morselhoarder's native -1/-1 counters and undying's +1/+1 counters annihilate each other upon entry through state-based actions, it returns with a clean slate ready to die again. Meanwhile, Blasting Station's untap trigger fires off every single time Morselhoarder re-enters, letting you endlessly repeat the cycle to machine-gun down any target while tapping into Morselhoarder's ability to filter out infinite colored mana along the way.