Cast End the Festivities by paying {R}.
Holding priority, cast Worldfire by paying {6}{R}{R}{R}, exiling all permanents, all cards in all hands and graveyards, and setting each player's life total to one.
Resolve End the Festivities, dealing 1 damage to each opponent.
Each opponent loses the game due to having zero life.

Each opponent loses the game

Exile all cards in all hands and graveyards

Exile all permanents

Near-infinite lifeloss

Worldfire

Hypersonic Dragon

End the Festivities

Cast Dragon's Approach by paying {2}{R}.
Holding priority, cast Worldfire by paying {6}{R}{R}{R}, exiling all permanents, all cards in all hands and graveyards, and setting each player's life total to one.
Resolve Dragon's Approach, dealing 3 damage to each opponent.
Each opponent loses the game due to having less than zero life.

Dragon's Approach

Cast an instant or sorcery spell by paying its mana cost, triggering Ashling.
Holding priority, cast Worldfire by paying {6}{R}{R}{R}.
Ashling triggers, causing you to rummage.
Resolve Worldfire, exiling all permanents, all cards in all hands and graveyards, and setting each player's life total to 1.
Resolve the Ashling trigger from step 1, dealling 2 damage to each opponent.
Each opponent loses the game as a state-based action due to having less than 0 life.

Near-infinite lifeloss for all players

Ashling, Flame Dancer

Activate Mindslaver by paying {4}, tapping it, and sacrificing it, gaining control of them during their next turn.
Move to their turn.
Cast Wheel of Misfortune for {2}{R}, selecting an arbitrarily large number for the opponent you control, and dealing that much damage to the opponent  if the oponent chose the largest number.
If the opponent didn't choose the largest number, Wheel of Misfortune deals that much damage to each opponent who chose the largest number.

Near-infinite damage to target opponent

Wheel of Misfortune

Mindslaver

Activate Mindslaver by paying {4}, tapping and sacrificing it, causing you to gain control of target player during their next turn.
During the opponent's turn, cast Game of Chaos by paying {R}{R}{R}.
Resolve Game of Chaos, choosing to continue flipping a coin until the opponent loses the flip and the amount of life wagered is greater than or equal to the opponent's life total.
The opponent loses the game due to having 0 or less life.

Near-infinite lifeloss for target opponent

Target opponent loses the game

Game of Chaos

Cast Cauldron Familiar by paying {B}.
When Cauldron Familiar enters the battlefield, it triggers.
Holding priority, cast Worldfire by paying {6}{R}{R}{R}, exiling all permanents, all cards in all hands and graveyards, and setting each player's life total to one.
Resolve the Voldran Epicure trigger from step 2, causing each opponent to lose 1 life and you to gain 1 life.
Each opponent loses the game due to having 0 or less life.

Cauldron Familiar

Cast Vampiric Tutor by paying {B}.
Hive Mind triggers, causing each opponent to create a copy of Vampiric Tutor.
Holding priority, cast Worldfire by paying {6}{R}{R}{R}.
Hive Mind triggers, causing each opponent to create a copy of Worldfire.
Resolve each Worldfire on the stack, exiling all permanents, all cards in all hands and graveyards, and setting each player's life total to one.
Resolve the first opponent's copy of Vampiric Tutor, causing them to search their library for a card, put it on top of their library and lose 2 life.
The opponent loses the game due to having less than zero life.
Repeat from step 6 for each remaining opponent.

Hive Mind

Vampiric Tutor

Activate Myojin of Roaring Blades by removing an indestructible counter from it.
Holding priority, cast Sway of the Stars by paying {8}{U}{U}, causing each player to shuffle their hand, graveyard and all permanents they own into their library, then causing each player to draw seven cards and set their life total to 7.
Resolve the Myojin of Roaring Blades ability, dealing 7 damage to each of up to three opponents.
Each opponent loses the game due to having 0 life.

Shuffle all hands, graveyards and permanents on the battlefield into their owner's library

Sway of the Stars

Myojin of Roaring Blades

Declare Fire Lord Azula as an attacker, triggering its firebending ability, adding {R}{R}.
Holding priority, cast Expropriate by paying its mana cost.
Fire Lord Azula's second ability triggers, copying Expropriate.
Holding priority, cast Narset's Reversal by paying {U}{U}, targeting the original Expropriate spell.
Fire Lord Azula's second ability triggers, copying Narset's Reversal, targeting the original Narset's Reversal.
Resolve the copy of Narset's Reversal, causing you to copy Narset's Reversal targeting the original Expropriate spell, and then return the original Narset's Reversal to your hand.
Resolve the copy of Narset's Reversal, copying Expropriate and returning the original Expropriate to your hand.
Resolve both copies of Expropriate from steps 3 and 7, causing you to take at least two extra turns after this one.
Repeat during your last extra turn.

Infinite turns

Fire Lord Azula

Narset's Reversal

Expropriate

At the beginning of your upkeep, Court of Embereth triggers.
Holding priority, cast Storm Herd by paying {8}{W}{W}, creating a number of 1/1 Pegasus creature tokens equal to your life total.
Resolve the Court of Embereth trigger, creating a 3/1 Knight creature token, then dealing damage to each opponent equal to the number of creatures you control.
Each opponent whose life total is less than or equal to the number of creatures you control loses the game due to having 0 or less life.

Near-infinite creature tokens

Near-infinite damage

Near-infinite ETB

Storm Herd

Court of Embereth

Cast Thoughtseize by paying {B}.
Hive Mind triggers, causing each opponent to create a copy of Thoughtseize.
Holding priority, cast Worldfire by paying {6}{R}{R}{R}.
Hive Mind triggers, causing each opponent to create a copy of Worldfire.
Resolve each Worldfire on the stack, exiling all permanents, all cards in all hands and graveyards, and setting each player's life total to one.
Resolve the first opponent's copy of Thoughtseize, causing them to lose 2 life.
The opponent loses the game due to having less than zero life.
Repeat from step 6 for each remaining opponent.

Combos with "Hypersonic Dragon"