Mechanics
Starry Form: 2.3 minutes remaining
Owl Cloak Wings: 3 rounds
Protection from Evil and Good on Vrod: 4.4 minutes
Eithne uses her arrow attack against the furthest Mourne. Then she moves in close enough to target the three other Mournes with a thunderclap. DC 17 CON save. Not certain how to handle the wisdom save for an area of effect attack that would hit all three at once. I know the spell has trouble against area of effect, but she still have to intend to hit them with it. Dunno. I rolled at least one save just in case for it.