Regeneration

[Adam Ormond]

Bestiary pp 303 wrote:

Creatures with regeneration heal damage at a fixed rate, as with fast healing, but they cannot die as long as their regeneration is still functioning (although creatures with regeneration still fall unconscious when their hit points are below 0). Certain attack forms, typically fire and acid, cause a creature’s regeneration to stop functioning on the round following the attack. During this round, the creature does not heal any damage and can die normally

Does this mean to kill a Troll (or other regenerating creature) you only need to hit it with a single point of fire damage on the round prior to reducing its hitpoints to -CON?

[Hobbun]

Yep, pretty much. Regeneration is a 'lot' weaker than it was in 3.5. We already had a Troll (NPC) die in our monster campaign.

(Our DM loves playing Trolls)