Board Thread:General Discussion/@comment-25926288-20150928010102/@comment-6344309-20151003055508

Eskaver wrote: I now have theorized why Zelena was zapped by the spell. (Not that it matters).

Rumple taught that using dark magic you use your darkness(anger and stuff) to bolster your magic and then rein it in or curtail it by a moment of light, a moment that you cherish. This would explain why Light magic was able to stun Zelena and the wand issue.

Zelena was shown to not really have that moment of light. So, Zelena is pretty much an ever flowing water pipe of darkness (or rather dark magic). So, when Regina used light magic on Zelena it pretty much put a stopper of Zelena's pipe which left her vulnerable. Likewise when Zelena used the wand, the wand is all light magic and once it used the Dark magic and its own light magic to make the portal, it put a stopper on Zelena's everflowing pipe of darkness which resulted in her little magical rupture which caused her to be weakened or stunned at that point.

This is why Regina was confident that Zelena using the wand for anything would have led to Zelena being weakened because Zelena lacks restraint when it comes to her magic, but that's what also makes Zelena's magic continually strong since the darkness never stops flowing to bolster her magic. (It's pretty much why she's also green via Envy. She can't ever seem to reign it in.)

But that's just a theory, a Once theory. Also, Zelena must have been so used to having her pendant, that she failed to realize how much faster she'd wear out without it.