Warden's Endurance [Multiclass Warden]

Prerequisite: Defender of the Wild feat
Benefit: Once per encounter, you can make a saving throw against one effect that a save can end at the start of your turn. On a save, the effect immediately ends, preventing it from affecting you on your current turn. If you fail the saving throw, you still make a saving throw against the effect at the end of your turn.

Published in Primal Power, page(s) 148.