Doomsday | Grenzo, Dungeon Warden | Kiki-Jiki, Mirror Breaker

(and four other cards)

Brazen Buccaneers in your graveyard or in your library.
Conspicuous Snoop in your graveyard or in your library.
Kiki-Jiki in your graveyard or in your library.
Sling-Gang Lieutenant in your graveyard or in your library.
Torch Courier in your graveyard or in your library.
Grenzo on the battlefield.
Doomsday in hand.
Your life total is at least 2.
({4} magic symbol) ({B} magic symbol) ({B} magic symbol) ({B} magic symbol) ({R} magic symbol) available.

Cast
Doomsday by paying ({B} magic symbol) ({B} magic symbol) ({B} magic symbol) , 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} magic symbol) , putting
Conspicuous Snoop into your graveyard and then onto the battlefield.
Cast
Torch Courier from the top of your library by paying ({R} magic symbol) .
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} magic symbol) , 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.