Okay, so he gets through for 3
 
Mt
Tyrant of Valakut for its surge cost
Responses?
 
Spidey: 15
Hand: 2
Battlefield:
 
(U) Swamp
(T,U) Forest x2
(T,U,U) Island x3
(T,T) Mt x2
(T,T) Plains x2
 
Containment Membrane (Surge U; Enchanted creature doesn't untap during its controller's untap step)...