During an opponent's turn, activate The Beamtown Bullies by tapping it, putting Bronze Bombshell onto the battlefield under that opponent's control.
Bronze Bombshell triggers, causing the opponent to sacrifice it and deal seven damage to that opponent.
Bronze Bombshell dies, triggering The Beamtown Bullies, untapping The Beamtown Bullies.
Repeat.

Infinite damage

The Beamtown Bullies

Bronze Bombshell

Thornbite Staff

Give control of Bronze Bombshell to an opponent.
Bronze Bombshell triggers, causing its controller to sacrifice it.
However, Bronze Bombshell cannot be sacrificed due to Assault Suit.
Bronze Bombshell triggers again, creating a mandatory infinite loop that causes the game to end in a draw.

Draw the game

Assault Suit

At the beginning of your end step, Jon Irenicus triggers, causing an opponent to gain control of Bronze Bombshell.
Bronze Bombshell triggers, causing the opponent to sacrifice it.
However, Bronze Bombshell cannot be sacrificed due to its ability granted by Jon Irenicus.
Bronze Bombshell triggers again, creating a mandatory infinite loop that causes the game to end in a draw.

Jon Irenicus, Shattered One

Cast Mirrorweave by paying {2}{W/U}{W/U}, causing each other creature to become a copy of It That Betrays until end of turn.
Sacrifice Bronze Bombshell by any method, triggering each It That Betrays controlled by an opponent.
Resolve one of the It the Betrays triggers, causing an opponent to put Bronze Bombshell from your graveyard onto the battlefield under their control.
Bronze Bombshell triggers, causing its controller to sacrifice it and dealing 7 damage to its controller.
Each It That Betrays not controlled by Bronze Bombshell's controller triggers, with your triggers being below each opponent's triggers.
Repeat from step 3.

Near-infinite damage

It That Betrays

Mirrorweave

Cast Fractured Identity by paying {3}{W}{U}, exiling It That Betrays and causing each opponent to create a token copy of it.
Sacrifice Bronze Bombshell by any method, triggering each It That Betrays controlled by an opponent.
Resolve one of the It the Betrays triggers, causing an opponent to put Bronze Bombshell from your graveyard onto the battlefield under their control.
Bronze Bombshell triggers, causing its controller to sacrifice it and dealing 7 damage to its controller.
Each It That Betrays not controlled by Bronze Bombshell's controller triggers.
Repeat from step 3.

Combos with "Bronze Bombshell"