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!
I'd probably never remember to track it for the PCs. I don't really tell them target numbers so they have to find out in play. I'd rather it be a feat and/or class ability that allows a 19 roll to be pushed into a 20 and thus critical.