How do i start an endless nightmare run?

[Corlin]

I just completed mastery 12, and got the option to do nightmare on my barbarian after the run. But now coming back to the game there is no where to start a run?

[Peter]

At the end of any run, when you finish the game show the option

[PenetrationStation]

Originally posted by Peter:

At the end of any run, when you finish the game show the option

are there pre-req's for endless? i just see the options to go back to menu or start again on the new mastery level, im new to game tho

[Vorstave]

Hi guys! Any run on Mastery 10 or higher is eligible for Endless Nightmare.

[Mr Kittyface]

I just finished two runs mastery 10 and also did not see a endless option, I just saw nightmare.

Edit: This was for bandit and summoner

[Flabort]

Originally posted by Mr Kittyface:

I just finished two runs mastery 10 and also did not see a endless option, I just saw nightmare.

Edit: This was for bandit and summoner

Nightmare is the endless option. At least, until the second endless mode mentioned in the dev log is released.