Mikaeus, the Unhallowed + Blasting Station + Chainbreaker

Mikaeus, the Unhallowed

Blasting Station

Chainbreaker

How it works

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