Attempt to deal any amount of damage to Phyrexian Vindicator.
Phyrexian Vindicator prevents the damage and triggers, dealing that much damage to any target.
Guilty Conscience triggers, attempting to deal that much damage to Phyrexian Vindicator.
Repeat from step 2.

Infinite damage

Guilty Conscience

Phyrexian Vindicator

Deal damage to Stuffy Doll.
Stuffy Doll triggers, dealing damage to the chosen player.
Guilty Conscience triggers, dealing damage to Stuffy Doll.
Repeat from step 2.

Infinite damage to target player

Stuffy Doll

Deal damage to the indestructible creature.
Blazing Sunsteel triggers, dealing damage equal to the damage dealt to any target.
Guilty Conscience triggers, dealing damage equal to the damage dealt to the indestructible creature.
Repeat from step 2.

Blazing Sunsteel

Deal damage to the indestructible creature.
Fiendlash triggers, causing the creature to deal damage equal to the creature's power to target player or planeswalker.
Guilty Conscience triggers, dealing that much damage to the creature.
Repeat.

Fiendlash

Cast Guilty Conscience by paying {W}, attaching it to the indestructible creature.
Cast Pain for All by paying {2}{R}, attaching it to the indestructible creature.
When Pain for All enters, it triggers, dealing damage equal to the enchanted creature's power to any target.
Guilty Conscience triggers, dealing that much damage to the creature.
Pain for All triggers, dealing that much damage to each opponent.
Repeat from step 3.

Pain for All

Activate Cacophodon by tapping it, dealing damage to any target.
Guilty Conscience triggers, dealing damage to Cacophodon.
Cacophodon triggers, untapping itself.
Repeat.

Cacophodon

Fire Whip

Deal combat damage either to a player or a creature using Coalhauler Swine.
Guilty Conscience and Coalhauler Swine trigger.
Resolve the Guilty Conscience trigger, dealing damage to Coalhauler Swine equal to the amount of damage Coalhauler Swine dealt.
Coalhauler Swine triggers, dealing that much damage to each other creature and each opponent.
Guilty Conscience triggers.
Repeat from step 3.

Combos with "Guilty Conscience"