Mikaeus, the Unhallowed + Blasting Station + Slumbering Walker

Mikaeus, the Unhallowed

Blasting Station

Slumbering Walker

How it works

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