Nah it's not. However it's a beneficial technique.
Some say it is jutsu of otsutsuki
Some say it has something to do Kaguya
And it can take and bring back life. So yeah it is one of strongest
You speak shit most of the time.Tsunade can tank it
A jutsu that takes the caster's life just to work has to be strong otherwise there's no point casting it.
The other question is does it only works on caster? Or one can use it against an enemy?