Best answer: Microsoft's Surface Pen works well with the HP Envy x2.
Microsoft: Surface Pen ($100)
It just works
The Surface Pen is an excellent accessory for any Windows 10 tablet that supports it. Lucky for HP Envy x2 owners, Microsoft's handy drawing tool works just fine with this device too. The pen itself uses N-trig, which is fine for the Envy x2, allowing you to not only pair the two together and use them without issue, but the button also works.
N-trig is just a fancy name for the technology used to make it all work like magic. Microsoft liked the tech N-trig produced so much that the Israel-based company was purchased in 2015, hence why you now see N-trig with all new Surface devices instead of Wacom.
Go forth and draw all the things, whilst using the Surface Pen button to open apps, wake up the tablet, or any other crazy function you can think of.
Our pick
Surface Pen
Channel your inner Bob Ross
HP bundles its own stylus with the Envy x2, which is fine, but if you already own the Surface Pen or wish to pick a better stylus up anyway, know that it'll work without issue.