The VOIDRUNNER'S CODEX is coming! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
This thread inspired me to pick up Curse of the Emerald Cobra. It, in fact, does feature Yuan-Ti (and Inphidians). Apparently, they had permission to use them.