Torghast has a limited resource called Vitality and Keys for Entry

[Fythra-madoran (Fythra)]

[NEWS] Shadowlands Preview: Torghast, Tower of the Damned

I’m here to confirm that vitality is not a resource within Torghast nor is there a mechanic akin to it. Only your deaths will halt your climb! Please keep in mind that not everything discovered in datamining exists or are feature final as Shadowlands is still in development.

Game. Set. Match.

Now you all can calm down.