Don't think testing it is gonna be on the table. Anything we try, we'll have to put enough faith in it to hope it'll stick. That's more the kind of magic I'm used to, admittedly.

[Merle's healing for the scarier moments, Barry and Taako's love for her during the liching, the bond engine for keeping them all alive for a hundred years. So much of her life has revolved around the faith she carried in the people she cares about. Any spell created to link their lives together more precisely and intricately would have to be based on the same theory.]