I'm hoping you can't catch up
Untap, upkeep
Island
Maw of Kozilek, triggering the Scourer
Attack with the Scourer for 2
Done
Spidey: 19
Hand: 11
Battlefield:
(T) Swamp
(T) Mt
(T) Forest
(T) Island
(U)
Reaver Drone (2/1; Devoid; At the beginning of my upkeep, I lose 1 life unless I control another colorless creature)
(T)
Sky Scourer (1/2; Devoid; Flying; Whenever I cast a colorless spell, ~ gets +1/+0 ueot)
(U)
Scion Summoner (2/2; Devoid; When ~ ETB, put a 1/1 colorless Eldrazi Scion creature token onto the battlefield. It has "Sac this creature: Add C to my mana pool.")
(U)
Eldrazi Drone creature token (1/1; Sac ~: Add C to my mana pool)
(S)
Maw of Kozilek (2/5; Devoid; C: ~ gets +2/-2 ueot)
Graveyard:
Exile:
============================================================================
Mooseman: 12
Hand: 13
Battlefield:
(T) Plains
(T) Swamp
(T) Forest
(U)
Stalking Drone (2/2,Devoid (This card has no color.) {C}: Stalking Drone gets +1/+2 until end of turn. Activate this ability only once each turn. ({C} represents colorless mana.)
(S)
Scion Summoner (2/2; Devoid; When ~ ETB, put a 1/1 colorless Eldrazi Scion creature token onto the battlefield. It has "Sac this creature: Add C to my mana pool.")
(S)
Eldrazi Drone creature token (1/1; Sac ~: Add C to my mana pool)
Graveyard:
Exile: