Etrata, the Silencer + Auton Soldier + Araumi of the Dead Tide Combo

Auton Soldier in your graveyard.

Etrata and Araumi of the Dead Tide on the battlefield (Araumi of the Dead Tide without summoning sickness on the battlefield).

You have at least three opponents. You have at least three other cards in your graveyard.

Each opponent controls at least three nontoken creatures. Opponents cannot block creatures you control.

available

Activate Araumi by tapping it and exiling three cards from your graveyard, ensuring not to exile Auton Soldier, giving Auton Soldier encore until end of turn.

Activate Auton Soldier's encore ability by paying and exiling it from your graveyard, creating a token copy of it with haste for each opponent you have. Choose to have each Auton Soldier enter as nonlegendary copies of Etrata with myriad.

Declare each Auton Soldier as an attacker, each attacking a different opponent.

Each Auton Soldier's myriad ability triggers, creating a token copy of it tapped and attacking each other opponent.

Deal combat damage using all the Auton Soldiers, triggering their abilities.

Resolve the first Auton Soldier trigger, exiling a creature an opponent controls with a hit counter on it and causing that opponent to lose the game if they have three or more cards with hit counters on them in exile.

Repeat step 6 as needed for the remaining triggers.

Each opponent loses the game