Riastarthae (Warp Fury)

When struck, a Celtic Hero rages

Feature Type: Script
Use: Automatic
Effect: Once per round when a Celtic character takes damage in combat, he or she makes a DC 15 saving throw against death. If successful, the character enters a rage similar to that of a barbarian. After entering Riastharthae, the character may not do so again until they rest.

If unsuccessful, the character makes another saving throw if they are damaged in any subsequent round.

Notes:
-Riastarthae is only available to Celtic characters
-The length of Riastarthae is based on character level
-Riastarthae adds +1 AC per character level for its duration
-Riastarthae can be used once every 10 minutes