Endurance

From AoP Wiki

Endurance is the third of the seven Specials a character can have a set amount of points in. Endurance is important, if you want your character to have more Health Points, have a higher Healing Rate, more Bleed Resistance, less Knockout Duration when you do get an unfortunate Knockout rolled against you, as well as be more resistant to being winded, or having your arms or legs crippled.

Each point of Endurance adds

Additionally, each point of Endurance raises the following starting value of Skills: