Venom Fishing: Shell of Yourself

You've learned some o' my secrets to fishin' in these cursed waters, but everything ye learn from here on serves a greater purpose than survival. Revenge. The Great White Serpent that sank my ship is still alive. If we intend to kill it, we need the power o' my crew, now lost to the venom-curse. Master Grenadier Birdie has one good shot: her first shot. Build yerself a decoy and you'll have a chance to kill her. Take her explosives. We'll need 'em to blow that snake to smithereens.