Eternal Mirane Cage

Instead of killing the target, they are reduced to negative their Max HP +1. The target is encased in Magical Ice for 10 years, rooted on the location and cannot be moved.  The Ice never melts despite temperature and can only be dispelled by Higher Order Magic (such as a Divine Arms), or by you. The Spell effect ends if you die. You can extend the duration of the Frost by 10 years for every 2 mana spent.