Immortal Zombies

Any1 knows for what are this Immortal Zombies?
I found them near bisha in datong. They are lvl 1 tons of hp and way much tons of dodge and def. This is another Troll from RF ?

 

We must RAID it guys. Let's do it.

 

You can find one in NSIP also near the first village

 

I see that too XD wanna kill them all

 

So we should all meet in NSIP near first village and kick their asses

 

There is one in Zhengzhou, just before you go into CoF.