Quick one: Does regeneration stack?

[Xietor]

regeneration from different items stack.

So shroud, plus ring regen, plus hydra armor all give regen.

Regeneration from one spell will augment the items, but only 1 spell will work. You can cast personal regeneration with the above items and all will stack, but cast a second spell with regeneration as a component like Strength of Gaia, and it will not stack.