Melira, Sylvok Outcast + Blasting Station + Grazing Kelpie

Melira, Sylvok Outcast

Blasting Station

Grazing Kelpie

How it works

1. Activate Blasting Station by tapping it and sacrificing Grazing Kelpie.
2. When Grazing 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 Grazing Kelpie enters, Blasting Station triggers, untapping Blasting Station
4. Resolve the Blasting Station ability from step 1
5. Repeat.