5 regen over 10 seconds upon taking damage only.
In a 10 minute fight, you're looking at ~300 ultimate IF you proc this on CD. Realistically, this can only happen in PvP when you're being bombarded by several people at once but you sure aren't going to survive long enough at that point for it to matter and since PvP is usually where short encounter are much more common outside of keep sieges, the benefit is meh at best. In PvE, since almost every mechanic is a 1 shot nowadays you're actively avoiding taking damage as much as possible, on top of bosses moving away, randomly targeting someone else, etc. that keeping it on CD in PvE doesn't sound realistic.

No, it's not OP but nor is it UP.

Since it is only 5 ult every 10 seconds, it also synergizes poorly with the decisive trait.

Not OP.

Some one said it’s close to minor heroism. So yea it’s good but not over the top. You can use a poison pot and it’s having the same passive as nb drinking pots if you think about that.
So pretty much nb nord going get 40 ulti from one pot. Sure powerful but it makes them unquie compared to being an argonian with pots which gives out resources.

I was just curious about what people thought about it, I could see a lot of potential in it, but I hadn't actually tried it out, and was thinking about looking into it. Thanks.