Overpowered kinda for a spell like that. What level would it be? It can't be Under level 40 Because then people would be to overpowered
Potboiler is already in the game, though as a TC:
4 pips 285 to all Death shield to self
Not much different that what the OP said. Having a blade instead of a shield, for life school, would be fair for a school with weak spells (before buffing)