Blazing Sunsteel + Spitemare

Prerequisites

You have a way to deal damage to Spitemare. Spitemare has indestructible.

Steps

1. Deal damage to Spitemare.
2. Spitemare and Blazing Sunsteel trigger.
3. Resolve the Spitemare trigger, dealing damage to any target.
4. Resolve the Blazing Sunsteel trigger, dealing damage to Spitemare.
5. Repeat from step 2.