Wait. Can the trolls even survive? They can't leave their hex otherwise the sun will cause very irritating burns, hindering the movement. Because Alternia's sun is so incredibly hot they adapted to underground movig and have skin that isn't use to direct sunlight. (Terezi looked at the sun for one second and went blind. Imagine them being in direct sunlight all day when outside their hex. Even though it's not the Alternian sun it'll still hurt like hell)