PLEASE HELP.. I just finished an act 3 rift with my friends. when we all teleporting to town, I was keep getting attacked by some INVISIBLE MOBS. I called out help in chat and they come it was too late. I DIED WHEN THERES NO MOB NEXT TO ME.. it started attacking my party member afterward. So what is this? Can I get some help please.!!!!
http://imgur.com/AgdmCjX
heres a screenshot.