[Blissey]

I know I've asked a lot already, but... Some of us are going crazy over this and need clarification:

When Mercala ATTEMPTED to heal Ryart's wounds, is it implied (see: confirmed) that she failed to heal him BECAUSE of Zera's unique ability to inflict Cursed Wounds?
If yes, does this mean Mercala would not be able to heal wounds caused by Zera, despite his Akasha not being able to sever her connection to life?
And tying into this question, is the Akasha the weapon that deals Cursed Wounds, or is it merely Zera's own unique ability? Seems like he wouldn't need the Akasha if that were the case.