Board Thread:Theories and Speculation/@comment-30168130-20170622230657/@comment-734582-20170624085702

Mr. Grave wrote: Didn't he say no drawbacks? I assumed that would include the injuries that the user receives. Without those injuries, the user could perform it multiple times - maybe not in one day but still. Doesn't that make the list pointless? Drawbacks are essential to ranking powers, because it's not just about using power, it's about what it costs you too. removing the drawbacks of 8 gates completely destroys the point of the jutsu.

Else i'd say that Reaper Death Seal is by far the most powerful jutsu, since it's an invisible undetectable demon that seals anyone.