How does one know??

CrimsonReaper · Nov 9, 2014

How does one know that he/she can perform the reaper death seal when u're technically dead once using it??? XD

Alastor · Nov 9, 2014

The same way they know they can use Rinne tensei.

Tarinth · Nov 9, 2014

That's what I also wondered about the 8 Gates lol. And another handful of techniques.
But the simple answer is... Kishi logic.