Alright. Set uses it on an ally, say Griffin. It costs him 5 Psi points initially to use it. And then say Griffin starts fighting a swordsman. But instead of Griffin taking damage, Set is slowly drained of Psi points based on how much damage the Swordsman attempts to do to Griffin at the rate of 6 damage costs 3 Psi points to redirect. But then, say Griffin goes outside of Set's range of 4 spaces. With Griffin outside his range, he can't redirect the damage Griffin would take, so the connection is severed and Set must use Redirect on Griffin again to resume protecting him from a distance. Does that make sense?