Untap, upkeep, Draw, attack with the Golem, Underground River, Royal Assassin, Done.
Spiderman: 17
Hand: 3
Library: 46
In Play:
(T,T) Underground Sea x2 (B/U Dual)
(U) Underground River (B/U Pain)
(T) Island
(T) Spire Golem (2/4, flying)
(U) Black Knight (2/2, first strike, pro-white)
(U)...