IRON WILL
Type: General, Tier 1.
Benefit: You get a +3 class bonus to Will saves.

IMPROVED IRON WILL
Type: General, Tier 2.
Prerequisite: Iron Will.
Benefit: Once per day, you can reroll a failed Will save. When you do so, you roll 2d20 and take the better result on the reroll.

GREATER IRON WILL
Type: General, Tier 3.
Prerequisite: Iron Will, Improved Iron Will.
Benefit: You can use Improved Iron Will once per encounter instead of once per day.