Ghyrson Starn, Kelermorph + Temple Altisaur + Bellowing Aegisaur + Spark Double

Ghyrson Starn, Kelermorph

Temple Altisaur

Bellowing Aegisaur

Spark Double

How it works

1. Give Bellowing Aegisaur indestructible by any method.
2. Deal damage to Bellowing Aegisaur, with all but 1 of that damage being prevented by Temple Altisaur.
3. Bellowing Aegisaur, Ghyrson Starn, and Spark Double trigger.
4. Resolve the Spark Double trigger, dealing 2 damage to any target.
5. Resolve the Ghyrson Starn trigger, dealing 2 damage to Bellowing Aegisaur, with all but 1 of that damage being prevented by Temple Altisaur.
6. Spark Double and Bellowing Aegisaur trigger.
7. Resolve the Bellowing Aegisaur trigger, putting a +1/+1 counter on each other creature you control.
8. Resolve the Spark Double trigger, dealing 2 damage to Bellowing Aegisaur, with all but 1 of that damage being prevented by Temple Altisaur.
9. Ghyrson Starn and Bellowing Aegisaur trigger.
10. Repeat from step 5.