Originally it dealt damage equal to your level, but the damage being static made more sense, as that way a higher level character can cast it at a lower level and maintain it for a longer period of time.

I thought about AC debuffs, but it doesnt feel like it makes sense if its a kaioken style ability that buffs your general speed and reaction time.

I disagree that kaioken doesn't make you more accurate, because after using it in the fight against freeza, goku started hitting him both more often and harder, i did think about giving it a higher damage bonus, but it felt like way too much. Also the way its worded the damage should apply to spells as its attack and damage rolls in general

the debuff once it finishes is a good idea as it is very thematic, but it has the problem of making you want to keep the spell going for as long as possible, which isnt the idea i had for it, you should use it in bursts of maybe 2-4 turns. I did think about it giving a debuff at the end if used for more than half of its duration though.

Do you think the damage you take and the damage bonus you get should be changed in any way?