Talk:Mag (Warframe)/@comment-124.13.105.46-20130916024806/@comment-124.148.133.150-20130916055851

Apparently - do 15 minutes or more in any regular survival to get T3 Survival key. I haven't got one yet, but I do have one T3 Mobile Defense key, which suggests that keys, at least, drop from survival. Source: one of my clanmates said it was confirmed by Scinbed (DE level designer).