So you take 13.
Massacre (using the ACC)
Responses?
Spidey: 15
Hand: 2
In Play:
(U) Island
(U) Swamp
(U) Mt
(T,U) Forest x2
(U,U) Plains x2
Sealof Strength (Sac ~: Target creature gets +3/+3 ueot)
(T) Trickster Mage (1/1, U, T, Discard a card: I may tap or untap target artifact, creature...