I mean, I figured it would cap out after a while. It starts off weak enough:

whip of the vampire snake (-2, 5d3+7) {Dx+7} (+7 spd)

Not too major. A decent whip overall.
I figured it would be a slow power creep as I kill stuff with it, up until some sort of cap.
But right now my whip is:

whip of the vampire snake (+16, 5d3+26) {Dx+39} (+39 spd)

And I've just gone past the wall of fire. lol
I mean, sure, it doesn't really grant any special powers other than the poison resist... but it's just getting bigger and bigger and making it easier and easier to slaughter stuff.
I don't really mind that, being able to one shot enemies is nice. But it seems kinda broken.