Untap, upkeep, draw, attack with the Knights, wait to see if damage is dealt successfully...
Spiderman (16)
Hand: 4
Library: 45
In Play:
(U,U) Plainsx2
(U) Mt
(U) Mind Stone (T: add 1 to my mana pool. 1,T,sac ~: draw a card)
(U) Mind Stone (T: add 1 to my mana pool. 1,T,sac ~: draw a card)...