So Nick is becoming Renard. Okay, if he turns into a Zauberbiest I’m going to freak out. That would be such a poor, weak “twist.” Unfortunately its something I can definitely see happening with how lazy the Grimm Writers have been lately. Am I the only one whose worried about “side-effects?” Nick being a Grimm is enough. We don’t need a weird Grimm!Beist. Not to mention how annoying and recycled that plot-line would be or how it would crowd these last episodes. 8-P Just no. Please Grimm. No.

I find it unlikely for a couple of reasons:

1. It wasn’t the twinning spell itself that turned Juliette into a Hexenbiest. It was a side-effect of the ritual they did later to return Nick’s Grimm abilities.
2. Nick’s blood is anathema to Hexenbiests. It literally banishes Hexenbiest powers, presumably Zauberbiest powers as well. Adalind and Juliette are immune to the effects, but there’s no reason to think Renard would be. So it’s likely Renard’s powers couldn’t take root or “live” in Nick’s body once he’s returned to his true form.

That being said, Nick–possibly Grimms in general but especially Nick–tends to absorb some of the traits of any magic he encounters. When he was attacked by the Jinnamuru Xunte, he developed super hearing after just a few hours of blindness.

And when Baron Samedi subjected him to the Dämmerzustand, he gained super strength (at least temporarily), superhuman stamina, that weird “stoneform” thing he used to do occasionally, and the ability to go long stretches without needing to breathe.

So it’s possible that his body would just absorb the Zauberbiest powers like it absorbs every other semi-useful trait or ability it comes into contact with. We’ll just have to wait and see!