Berserk

Forgoing the use of other magics and surrendering to baser instincts, the caster enters a berserk state.

This berserk state affords the caster extra damage and resistances. The caster gains resistance to slashing, bludgeoning, and piercing damage from non-magical sources for the duration of the spell(1 round at 4th level) , as well as a +1 to damage when cast at 4th level. This damage increases to +2 when cast at 5th level and the duration becomes 2 rounds and when cast at 6th level or higher it becomes a +3 and the duration increases to 3 rounds.

When cast at 9th level the caster also deals an additional 5d10 force damage and the duration increases to 5 rounds. However due to the strain of maintaining this state for so long, the caster experiences 1 level of exhaustion for each casting after the first between long rest, and the caster experiences 2 levels of exhaustion if cast at 9th level even if its the first cast.