Oathkeeper, Takeno's Daisho + Blasting Station + Sokka and Suki

Oathkeeper, Takeno's Daisho

Blasting Station

Sokka and Suki

How it works

1. Activate Blasting Station by tapping it and sacrificing the creature with changeling.
2. When that creature dies, Oathkeeper triggers, returning it from your graveyard to the battlefield.
3. When that creature enters, Sokka and Suki and Blasting Station trigger.
4. Resolve the Sokka and Suki ability, allowing you to attach Oathkeeper to that creature.
5. Resolve the Blasting Station ability from step 3, untapping it.
6. Resolve the Blasting Station ability from step 1, dealing 1 damage to any target.
7. Repeat.