Talk:Torment/@comment-75.138.173.222-20170213203018/@comment-27465847-20170213205759

Yeah, that's one of Warframe's weakest points and it seems like a working wiki is enough to justify no attempts at improvement for these things.

Initially, there was an event which then explained why they showed up (short story: they tried to assassinate Alad V for helping us). Now, whenever they appear, there's never given a reason as to why they do so. Well, they're minions of the Stalker and do mysterious things, I guess.

The pragmatic reason would be that they drop quite valuable mods of which quite a number can't be obtained otherwise, so they recur to polarise the in-game economy (e.g. Maiming Strike could be very well sold for 700+ Platinum).