Araumi of the Dead Tide + Blightsteel Colossus + Clone

Araumi of the Dead Tide

Blightsteel Colossus

Clone

How it works

1. Activate Araumi by tapping it and exiling cards from your graveyard equal to the number of opponent you have, giving Clone encore until end of turn.
2. Activate Clone's encore ability by paying 3 and exiling it, causing you to create a token copy with haste for each opponent you have.
3. Choose to have each Clone token enter the battlefield as a copy of Blightsteel Colossus.
4. Deal combat damage to each opponent using a Clone token, causing each opponent to get eleven poison counters.
5. Each opponent loses the game due to having ten or more poison counters.