Curious to see the creativity. (btw someone please do another hunger games because why not and if so link me to it. Thank you! :

I can choose my own side effect

You have cancer

So what you’re saying is you’ll just have cancer?

anything i don't want to happen won't happen if i say NO.

for example: someone makes a side effect to this ability. i say NO. then time reverts and changes one small thing and the action cannot happen again

I can turn invisible

you have outlines

Oof

Can create anything in any medium at any time

Ability to accelerated bunnyhop

You’re a furry

Lol

random chance of failing

But you become lopunny for 1 hour is you do a bunnyhop

Power to morb in to anyone (mystique from x men)

you have limited time

?

on the morbing, you have limited time on the morbing

Ok that’s a fair side effect