Activate Dollhouse of Horrors by paying {1}, tapping it and exiling Tree of Perdition from your graveyard, creating a token copy of Tree of Perdition that is a 0/0 Construct 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 zero or les life.

Near-infinite lifeloss for target opponent

Target opponent loses the game

Tree of Perdition

Dollhouse of Horrors

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, 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.

God-Pharaoh's Gift

At the beginning of your combat phase, Offspring's Revenge triggers, exiling Tree of Perdition from your graveyard and creating a 1/1 copy of it 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 zero or les life.

Combos with "Electropotence"