D&D 5E (2014) Oil of rogain

[abe ray]

Seriously though:would it work as a common magic item?

 

[not-so-newguy]

Seriously though:would it work as a common magic item?

Yes, common.

I'd say it might even be bought in settings where magic items aren't normally sold.

 

[Eltab]

Seriously though:would it work as a common magic item?

We've been having fun with it, but I think the hair-grower would rate as another of Xanathar's 'minor magical effects', like the cape that billows dramatically without needing a breeze.