Cast Doomsday by paying {B}{B}{B}, searching your library and graveyard for Torch Courier, Kiki-Jiki, Mogg Fanatic, Brazen Buccaneers and Conspicuous Snoop, exiling all other cards from your graveyard and library, and then placing the remaining cards on top of your library in the order previously listed and losing half your life, rounded up.
Activate Grenzo by paying {2}, putting Conspicuous Snoop into your graveyard and then onto the battlefield.
Cast Torch Courier from the top of your library by paying {R}.
Activate Torch Courier by sacrificing it, giving Conspicuous Snoop haste until end of turn.
Activate Conspicuous Snoop using Kiki-Jiki's ability by tapping it, creating a token copy of Conspicuous Snoop with haste.
Repeat step 5 with the new Conspicuous Snoop token an arbitrarily large amount of times.
Activate Grenzo by paying {2}, putting Brazen Buccaneers into your graveyard and then onto the battlefield.
Brazen Buccaneers enters the battlefield, revealing Kiki-Jiki, putting a +1/+1 counter on Brazen Buccaneers and putting Kiki-Jiki into your graveyard.
Activate a Conspicuous Snoop using Mogg Fanatic's ability by sacrificing it, dealing 1 damage to any target.
Repeat from step 9.

Each opponent loses the game

Infinite creature tokens with haste

Infinite damage

Infinite death triggers

Infinite ETB

Infinite LTB

Infinite sacrifice triggers

Doomsday

Grenzo, Dungeon Warden

Kiki-Jiki, Mirror Breaker

Conspicuous Snoop

Torch Courier

Brazen Buccaneers

Mogg Fanatic

Cast Doomsday by paying {B}{B}{B}, searching your library and graveyard for Torch Courier, Kiki-Jiki, Sling-Gang Lieutenant, Brazen Buccaneers and Conspicuous Snoop, exiling all other cards from your graveyard and library, and then placing the remaining cards on top of your library in the order previously listed and losing half your life, rounded up.
Activate Grenzo by paying {2}, putting Conspicuous Snoop into your graveyard and then onto the battlefield.
Cast Torch Courier from the top of your library by paying {R}.
Activate Torch Courier by sacrificing it, giving Conspicuous Snoop haste until end of turn.
Activate Conspicuous Snoop using Kiki-Jiki's ability by tapping it, creating a token copy of Conspicuous Snoop with haste.
Repeat step 5 with the new Conspicuous Snoop token an arbitrarily large amount of times.
Activate Grenzo by paying {2}, putting Brazen Buccaneers into your graveyard and then onto the battlefield.
Brazen Buccaneers enters the battlefield, revealing Kiki-Jiki, putting a +1/+1 counter on Brazen Buccaneers and putting Kiki-Jiki into your graveyard.
Activate a Conspicuous Snoop using Sling-Gang Lieutenant's ability by sacrificing a Goblin, causing an opponent to lose 1 life and you to gain 1 life.
Repeat from step 9.

Infinite lifegain

Infinite lifegain triggers

Infinite lifeloss

Sling-Gang Lieutenant

Cast Doomsday by paying {B}{B}{B}, searching your library and graveyard for Torch Courier, Kiki-Jiki, Goblin Firestarter, Brazen Buccaneers and Conspicuous Snoop, exiling all other cards from your graveyard and library, and then placing the remaining cards on top of your library in the order previously listed and losing half your life, rounded up.
Activate Grenzo by paying {2}, putting Conspicuous Snoop into your graveyard and then onto the battlefield.
Cast Torch Courier from the top of your library by paying {R}.
Activate Torch Courier by sacrificing it, giving Conspicuous Snoop haste until end of turn.
Activate Conspicuous Snoop using Kiki-Jiki's ability by tapping it, creating a token copy of Conspicuous Snoop with haste.
Repeat step 5 with the new Conspicuous Snoop token an arbitrarily large amount of times.
Activate Grenzo by paying {2}, putting Brazen Buccaneers into your graveyard and then onto the battlefield.
Brazen Buccaneers enters the battlefield, revealing Kiki-Jiki, putting a +1/+1 counter on Brazen Buccaneers and putting Kiki-Jiki into your graveyard.
Activate a Conspicuous Snoop using Goblin Firestarter's ability by sacrificing it, dealing 1 damage to any target.
Repeat from step 9.

Goblin Firestarter

Combos with "Brazen Buccaneers"