Move to your combat phase, God-Pharaoh's Gift trigger.
Resolve God-Pharaoh's Gift by exiling Combat Celebrant from your graveyard and creating a token copy of Combat Celebrant.
Attack with Ghired and token copy of Combat Celebrant.
Ghired triggers, creating a copy of Combat Celebrant token.
Exert Combat Celebrant, untapping all other creatures you control, gaining additional combat phase after this one.
Repeat from step 4.

Infinite combat phases

Infinite creature tokens with haste

Ghired, Conclave Exile

Combat Celebrant

God-Pharaoh's Gift

Mass Hysteria

At the beginning of your combat phase, God-Pharaoh's Gift triggers, exiling Tree of Perdition from your graveyard and creating a token copy of it that is a 4/4 Zombie with haste.
When the Tree of Perdition token enters the battlefield, Electropotence triggers.
Holding priority, activate the Tree of Perdition token by tapping it, swapping an opponent's life total with Tree of Perdition's toughness.
Resolve the Electropotence trigger, causing you to pay {2}{R} to have the Tree of Perdition token deal damage equal to its power to the opponent whose life total was swapped.
The opponent loses the game due to having 0 life.

Near-infinite lifeloss for target opponent

Target opponent loses the game

Tree of Perdition

Electropotence

At the beginning of your combat phase, God-Pharaoh's Gift triggers, exiling Tree of Perdition from your graveyard and creating a token copy of it that is a 4/4 Zombie with haste.
When the Tree of Perdition token enters the battlefield, Terror of the Peaks triggers.
Holding priority, activate the Tree of Perdition token by tapping it, swapping an opponent's life total with Tree of Perdition's toughness.
Resolve the Terror of the Peaks trigger, causing it to deal damage equal to Tree of Perdition's power to the opponent whose life total was swapped.
The opponent loses the game due to having 0 life.

Terror of the Peaks

At the beginning of your combat phase, God-Pharaoh's Gift triggers, exiling Tree of Perdition from your graveyard and creating a token copy of it that is a 4/4 Zombie with haste.
When the Tree of Perdition token enters the battlefield, Warstorm Surge triggers.
Holding priority, activate the Tree of Perdition token by tapping it, swapping an opponent's life total with Tree of Perdition's toughness.
Resolve the Warstorm Surge trigger, causing the Tree of Perdition token to deal damage equal to its power to the opponent whose life total was swapped.
The opponent loses the game due to having 0 life.

Warstorm Surge

At the beginning of your combat phase, God-Pharaoh's Gift triggers, exiling Tree of Perdition from your graveyard and creating a token copy of it that is a 4/4 Zombie with haste.
When the Tree of Perdition token enters the battlefield, Pandemonium triggers.
Holding priority, activate the Tree of Perdition token by tapping it, swapping an opponent's life total with Tree of Perdition's toughness.
Resolve the Pandemonium trigger, causing the Tree of Perdition token to deal damage equal to its power to the opponent whose life total was swapped.
The opponent loses the game due to having 0 life.

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