Cast Triumph of the Hordes by paying {2}{G}{G}, giving creatures you control +1/+1 and infect until end of turn.
Activate Auriok Replica by paying {W} and sacrificing it, preventing all damage Skirk Fire Marshal would deal to you this turn.
Activate Skirk Fire Marshal by tapping five Goblins you control, putting ten -1/-1 counters on each other creature and giving each opponent ten poison counters.
Each opponent loses the game due to having ten poison counters.

Each opponent loses the game

Skirk Fire Marshal

Auriok Replica

Triumph of the Hordes

Cast Tainted Strike by paying {B}, giving Skirk Fire Marshal +1/+0 and infect until end of turn.
Activate Auriok Replica by paying {W} and sacrificing it, preventing all damage Skirk Fire Marshal would deal to you this turn.
Activate Skirk Fire Marshal by tapping five Goblins you control, putting ten -1/-1 counters on each other creature and giving each opponent ten poison counters.
Each opponent loses the game due to having ten poison counters.

Combos with "Auriok Replica"