Melira, Sylvok Outcast + Blasting Station + Trapjaw Kelpie

Melira, Sylvok Outcast

Blasting Station

Trapjaw Kelpie

How it works

1. Activate Blasting Station by tapping it and sacrificing Trapjaw Kelpie.
2. When Trapjaw Kelpie dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Melira.
3. When Trapjaw Kelpie enters, Blasting Station triggers, untapping Blasting Station
4. Resolve the Blasting Station ability from step 1
5. Repeat.

This loop turns a simple sacrifice outlet into an infinite-damage engine by cleverly sidestepping the primary drawback of the persist mechanic. While Trapjaw Kelpie would normally return to the battlefield neutralized by a -1/-1 counter, Melira, Sylvok Outcast's static ability completely prevents those counters from ever being placed on your creatures. This allows the Kelpie to die and return endlessly, each new arrival triggering Blasting Station to untap itself so you can immediately sacrifice the creature again to ping any target.