Spirit of the Freezing Sea

Convoke (Your creatures can help cast this spell.
Each creature you tap while casting this spell pays
for {1}1 or one mana of that creature's color.)
{u}: Spirit of the Freezing Sea gets +1/+0 until
end of turn. For each three times you use this;
if {s} was used as part of the cost, tap a target
permanent.
"It rose above our heads, above the ship, and still
higher yet. No foggy, ice-laden sea in the world could
frighten me more." - Captain's Journal