The low, steady purr of the Kethai has been a source of interest since their arrival. Among their own kind, it is evidently used for bonding, as well as communication, signalling an individual's contentment. Applied to a willing or unsuspecting human, however, it induces a state of pleasant tranquillity akin to a mild narcotic, and some physicians have even suggested it may promote healing. Nothing on the level of a proper health potion, of course, but early estimates propose it could accelerate the body’s natural recovery by as much as a hundred and fifty percent. The practical implications are obvious, and demand further research. If the subjugated population were to be distributed among the legions, it would significantly reduce the downtime of wounded soldiers.

I see. And that's why I find you in bed with two of them, is it, Xenethon? Research?

I was curious to see if the effect stacked, sir.

Hm... You don't appear to be injured.

It must be working, sir!

... I'm starting to question how you spend your funding, boy.