Blasting Station + Lesser Masticore + Mm'menon, Uthros Exile

Blasting Station

Lesser Masticore

Mm'menon, Uthros Exile

How it works

1. Activate Blasting Station by tapping it and sacrificing Lesser Masticore.
2. When Lesser Masticore dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When Lesser Masticore enters, Blasting Station and Mm'menon trigger.
4. Resolve the Blasting Station trigger, untapping it.
5. Resolve the Mm'menon trigger, putting a +1/+1 counter on Lesser Masticore.
6. Resolve the Blasting Station ability from step 1.
7. Repeat.

This clever loop relies on Lesser Masticore's persist ability to recycle itself endlessly from the graveyard, fueled by Blasting Station's sacrificial outlet to constantly fling damage at any target. While persist normally consigns the Masticore to a downward spiral via -1/-1 counters, Mm'menon, Uthros Exile steps in as the key enabler by placing a +1/+1 counter on it whenever an artifact enters. Because state-based actions cause +1/+1 and -1/+1 counters to annihilate each other upon entering the creature, the Masticore enters cleanly with zero counters left, ready to be sacrificed to Blasting Station all over again while the Station simultaneously untaps itself from the creature's entrance.