Supernova
Casting Time: 1 action
Range: touch
Components: V, S
Spell level: 7
Accelerated cut-off point : 16
Accelerated Dice : d8
NoD = to the amount of turn the effect lasts 

for the duration of the effect you are immune to all damage and the damage you would take is stored and after the effect stops all the damage is burst out onto a 5ft radius around you.