Mikaeus, the Unhallowed + Blasting Station + Loch Mare

Mikaeus, the Unhallowed

Blasting Station

Loch Mare

How it works

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