Imminent Attack
Feats
At 15th level, a hunter as a standard can shoot an ammunition 3 times per day, which marks all enemies in a 10-foot area as prey. Against such creatures the animal companion gets a +3 morale bonus to attack and damage, and its attacks bypass DR N/cold iron, N/mithral, N/adamantine, and hardness. Whenever the animal companion kills a marked enemy, all its attacks' critical range increases by 1 until the end of combat. Multiple applications of this effect stack.