Woo, I might have a chance :)
Untap, upkeep, Draw, Underground River, tap out and take a hit to cast Black Knight, Done.
Spiderman: 19
Hand: 5
Library: 52
In Play:
(T) Underground Sea (B/U Dual)
(T) Underground River (B/U Pain)
(S) Black Knight (2/2, first strike, pro white)
Graveyard:
RFG...