Deal damage to Coalhauler Swine.
Coalhauler Swine triggers, dealing that much damage to each player. Any damage that would be dealt to you is instead dealt to Coalhauler Swine due to Pariah's Shield.
Repeat step 2.

Infinite damage

Draw the game

Coalhauler Swine

Pariah's Shield

Cast Volcano Hellion by paying {2}{R}{R}.
Volcano Hellion enters the battlefield, triggering itself, dealing an arbitrarily large amount of damage to Coalhauler Swine and to you, which does not reduce your life total below 1 due to Fortune Thief.
Coalhauler Swine triggers, dealing an equal amount of damage to each player, which again does not reduce your life total below 1.

Fortune Thief

Volcano Hellion

Cast Angel's Grace by paying {W}, making it impossible for you to lose the game or have your life total reduced below 1 this turn.
Cast Volcano Hellion by paying {2}{R}{R}.
Volcano Hellion enters the battlefield, triggering itself, dealing an arbitrarily large amount of damage to Coalhauler Swine and to you, which does not reduce your life total below 1.
Coalhauler Swine triggers, dealing an equal amount of damage to each player, which again does not reduce your life total below 1.

Angel's Grace

Cast Volcano Hellion.
When it enters the battlefield, it does near infinite damage to you and to Coalhauler Swine, and you gain life equal to the damage dealt.
Coulhauler Swine deals that much damage to each player, gaining you that much life.

Infinite lifegain

Whip of Erebos

Activate Tree of Perdition, exchanging target opponent's life total with Tree of Perdition's toughness.
Cast Blasphemous Act, dealing thirteen damage to all creatures.
Coalhauler Swine triggers, dealing thirteen damage to target opponent.

Target player takes a lethal amount of damage

Tree of Perdition

Blasphemous Act

Activate Tree of Perdition, exchanging target opponent's life total with Tree of Perdition's toughness.
Cast Star of Extinction for {5}{R}{R}, destroying target land and dealing 20 damage to all creatures and planeswalkers.
Coalhauler Swine triggers, dealing 20 damage to target opponent.

Star of Extinction

Cast Volcano Hellion by paying {2}{R}{R}.
Volcano Hellion enters the battlefield, triggering itself, dealing an arbitrarily large amount of damage to Coalhauler Swine and to you, which does not reduce your life total below 1 due to Worship.
Coalhauler Swine triggers, dealing an equal amount of damage to each player, which again does not reduce your life total below 1.

Worship

Activate Tree of Perdition, exchanging target opponent's life total with Tree of Perdition's toughness.
Cast Shivan Meteor for {3}{R}{R}, dealing thirteen damage to Coalhauler Swine.
Coalhauler Swine triggers, dealing 20 damage to target opponent.

Shivan Meteor

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.

Guilty Conscience

Indestructibility

Solitary Confinement

Activate Tree of Perdition, exchanging target opponent's life total with Tree of Perdition's toughness.
Cast Into the Maw of Hell for {4}{R}{R}, destroying target land and dealing thirteen damage to Coalhauler Swine.
Coalhauler Swine triggers, dealing 20 damage to target opponent.

Into the Maw of Hell

Cast Volcano Hellion by paying {2}{R}{R}.
Volcano Hellion enters the battlefield, triggering itself, dealing an arbitrarily large amount of damage to Coalhauler Swine and to you, which does not reduce your life total below 1 due to Serra the Benevolent's emblem.
Coalhauler Swine triggers, dealing an equal amount of damage to each player, which again does not reduce your life total below 1.

Serra the Benevolent

Cast Volcano Hellion by paying {2}{R}{R}.
Volcano Hellion enters the battlefield, triggering itself, dealing an arbitrarily large amount of damage to Coalhauler Swine and to you, which does not cause you to lose the game due to Gideon of the Trials's emblem.
Coalhauler Swine triggers, dealing an equal amount of damage to each player, which again does not cause you to lose the game.

Gideon of the Trials

Cast Volcano Hellion by paying {2}{R}{R}.
Volcano Hellion enters the battlefield, triggering itself, dealing an arbitrarily large amount of damage to Coalhauler Swine and to you, which does not reduce your life total below 1 due to Sustaining Spirit.
Coalhauler Swine triggers, dealing an equal amount of damage to each player, which again does not reduce your life total below 1.

Combos with "Coalhauler Swine"