How fatal is this hax?

[Orange]

Let's say:
you have a hax that allows you to use the total energy of your opponent, and donate it at all once, essentially blowing up the opponent with their entire resolve of energy.
How strong would this be? Is there any character that can use/survuve such ability? Is it a good or hax or nah

 

[LIFE_OF_KING]

This Hax is actually quite common

 

[Orange]

Oh wait really? Is it dangerous or no? And who has it? If you don't mind me asking that is