Talk:Terminal Velocity/@comment-108.67.8.242-20160428093700/@comment-24613667-20160509075025

Sprag and Ven'kra Tel only appear in Void Sabotage missions (T1 and T3), so you need keys if you want to farm them. Yeah, you can kill them and restart without losing the key, but they still drop other junk far more often than Terminal Velocity.

Drekar Hellions are somewhat rare, I think they only appear in Survival missions on Uranus. But, if the stats on their wiki page are to be believed, Terminal Velocity has a 0.563% chance to drop from them.

And, Conclave...is Conclave. I (and many other people) have no desire to play it.

tl;dr - It's just tedious to obtain if you don't regularly do the content in which it's available.