Deal damage to Frilled Deathspitter.
Frilled Deathspitter and Blazing Sunsteel trigger.
Resolve the Frilled Deathspitter trigger, dealing damage to any opponent
Resolve the Blazing Sunsteel trigger, dealing damage to Frilled Deathspitter.
Repeat from step 2.

Infinite damage

Blazing Sunsteel

Frilled Deathspitter

Deal damage to Frilled Deathspitter.
Frilled Deathspitter and Fiendlash trigger.
Resolve the Frilled Deathspitter trigger, dealing damage to an applicable target.
Resolve the Fiendlash trigger, targeting you, but dealing damage to Frilled Deathspitter instead due to Pariah.
Repeat from step 2.

Infinite damage to target opponent

Fiendlash

Pariah

Deal damage to Frilled Deathspitter.
Frilled Deathspitter triggers, dealing 2 damage to an opponent.
Guilty Conscience triggers, dealing damage to Frilled Deathspitter.
Repeat from step 2.

Guilty Conscience

Deal damage to Frilled Deathspitter.
Frilled Deathspitter and Repercussion trigger.
Resolve the Frilled Deathspitter trigger, dealing damage to an applicable target.
Resolve the Repercussion trigger, dealing damage to Frilled Deathspitter instead of you due to Pariah's Shield.
Repeat from step 2.

Repercussion

Pariah's Shield

Give Frilled Deathspitter indestructible by any method.
Deal damage to Frilled Deathspitter, with all but 1 of that damage being prevented by Temple Altisaur.
Frilled Deathspitter, Ghyrson Starn, and Spark Double trigger.
Resolve the Ghyrson Starn trigger, dealing 2 damage to Frilled Deathspitter, with all but 1 of that damage being prevented by Temple Altisaur.
Spark Double and Frilled Deathspitter trigger.
Resolve the Frilled Deathspitter trigger, dealing 2 damage to target opponent.
Resolve the Spark Double trigger, dealing 2 damage to Frilled Deathspitter, with all but 1 of that damage being prevented by Temple Altisaur.
Ghyrson Starn and Frilled Deathspitter trigger.
Repeat from step 4.

Ghyrson Starn, Kelermorph

Temple Altisaur

Spark Double

Earthbend a basic land you control.
Cast Legolas's Quick Reflexes by paying {G}, targeting the earthbent land.
Activate Earthcraft by tapping the earthbent land, targeting the earthbent land.
The land triggers, causing it to deal damage equal to its power to Frilled Deathspitter.
Frilled Deathspitter triggers, dealing that much damage to an applicable target.
Resolve the Earthcraft trigger, untapping the earthbent land.
Repeat from step 3.

Combos with "Frilled Deathspitter"