Untap, upkeep, Draw
Attack with everyone, triggering the Couriers and Kari Zev
Responses/blocks/take it?
Spidey: 20
Hand: 3
Library: 44
Battlefield:
(U,U,U) Mt x3
(T,A) Bomat Courier #1 (1/1; Haste; Whenever ~ attacks, exile the top card of my library face down.; R, Discard my hand, sac ~: Put all cards exiled with ~ into their owner's hands)
(T,A) Kari Zev, Skyship Raider (1/3; First strike, menace; Whenever ~ attacks, create a legendary 2/1 red Monkey creature token named Ragavan that's tapped and attacking. Exile that token at end of combat)
(T,A) Bomat Courier #2 (1/1; Haste; Whenever ~ attacks, exile the top card of my library face down.; R, Discard my hand, sac ~: Put all cards exiled with ~ into their owner's hands)
(T,A) Soul-Scar Mage (1/2; Prowess; If a source I control would deal noncombat dmg to a creature Oversoul controls, put that many -1/-1 ctrs on that creature instead)
(T,A) Monkey creature token (2/1)
Graveyard:
Exile: Face down card from Courier #1, Face down card from Courier #1, Face down card from Courier #1, Face down card from Courier #2
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Oversoul: 13
Hand: 7
Library: 50
Battlefield:
(U) Plains
(U) Island
(T) Irrigated Farmland (T: add W or U to my mana pool. ~ EtB tapped. Cycling 2.)
Graveyard:
Exile: