It's called a jutsu sweet heart.
Lol, I called it a spell... And technically speaking, it's not called "Dragon Jutsu" now is it..? XD
So that means there is technically 3 ways to kill an Edo... Technically speaking of course. :3
I'd bet dollars to donuts that the death reaper seal would also work...
3. Crying/making emo- don't tell meh that this is only for fillers...?1. Seal people
2. Rip their soul out