Editing Open4E:Skills (section)

===Endurance ===
Endurance is used when braving pain, weather, extremes of temperature or environment, performing feats of endurance, staving off hunger or thirst, or holding your breath. Your Endurance skill check is based on your Constitution modifier.  The Endurance skill incurs an armor check penalty if you are wearing armor or a shield.

=====Maintain Concentration=====
* (At-will free reaction * basic skill utility)
Trigger:	You take more damage than your Constitution modifier from a single hit while in a stance
Check:	Endurance vs. the amount of damage you have taken. 
Success:	You do not break the stance. 
Failure:	You are forced to end the stance.

=====Stabilize=====
* (Automatic Reaction * basic skill saving throw)
* Trigger:	You begin your turn while suffering from the dying condition.
* Save:	Endurance vs. 10 + twice the damage you have taken in excess of your Hearts 
* Success:	You are no longer dying (unless you take further damage), but are still unconscious so long as you are at 0 Hearts. On a critical success, you regain ½ Heart.
* Failure:	You are still dying. 

=====Shrug it Off=====
* (Automatic Reaction * basic skill saving throw)
* Trigger:	You would take ongoing damage.
* Save:	Endurance vs. the check result of the effect that caused the condition.
* Success:	You take the ongoing damage, and the condition ends. On a critical success, you take no damage and the condition ends.
* Failure:	You take the full ongoing damage and continue to suffer any of its other ongoing effects.