Untap, draw, Plains, go.
Spiderman: 14
Hand: 2
Library: 42
In Play:
(T,U) Underground River (B/U Pain land)
(U,U) Watery Grave x2 (B/U Ravnica Dual)
(U,U) Island x2
(T,U) Swamp x2
(T) Szadek-Lord of Secrets (20/20?, flying, if ~ would deal combat dmg to you, instead put that many +1/+1 ctrs...