Ferocity (Ex)
A creature with ferocity remains conscious and can continue fighting even if its hit point total is below 0. The creature is still staggered and loses 1 hit point each round. A creature with ferocity still dies when its hit point total reaches a negative amount equal to its Constitution score.
Format: ferocity; Location: Defensive Abilities.
Greenskin Orc's Ferocity does not equal Half-Orc's Orc Ferocity. It doesn't just last 1 round and it doesn't have the 1/day limit. It's like Diehard, except you still lose hit points even if you take non-strenuous actions (so, worse than the feat).