Stage 1 curse mark

Name: Stage 1 Curse Mark. Description: The user has been imbued with corrupted nature energy, by releasing this energy the user gains enhanced strength and deals more damage than usual. By entering the stage 1 evolution the user gains 1 benefit of the user's choosing and gain a +1 crit modifier. Bonus 1: User gains +5 power and deals +20 damage on all attacks and techniques. Bonus 2: User gains 1 benefit of their choosing, that cannot be changed once chosen, and gains a +1 crit modifier. Bonus 3: ???. Chakra cost: 50 per round. Requirement: B rank senjutsu.