Hero's DefianceFocus 10
Source Pathfinder Player Core 2
Cast

Trigger An attack would bring you to 0 Hit Points.
You shout in defiance and are filled with a burst of healing. Just before applying the attack's damage, you recover 6d8+20 Hit Points. If this is enough to prevent the attack from bringing you to 0 Hit Points, you don't become Unconscious or Dying. Either way, cheating death is difficult, and you can't use hero's defiance again until you Refocus or make your daily preparations. Hero's defiance can't be used against effects with the death trait or that would leave no remains, such as disintegrate.
Traits
Something of uncommon rarity requires special training or comes from a particular culture or part of the world. Some character choices give access to uncommon options, and the GM can choose to allow access for anyone. Less is known about uncommon creatures than common creatures. They typically can't be summoned. The DC of Recall Knowledge checks related to these creature is increased by 2.
ChampionThis indicates abilities from the champion class.
ConcentrateAn action with this trait requires a degree of mental concentration and discipline.
FocusFocus spells are a special type of spell attained directly from a branch of study, from a deity, or from another specific source. You can learn focus spells only through special class features or feats, rather than choosing them from a spell list. Furthermore, you cast focus spells using a special pool of Focus Pointsโyou can't prepare a focus spell in a spell slot or use your spell slots to cast focus spells; similarly, you can't spend your Focus Points to cast spells that aren't focus spells.
HealingA healing effect restores a creature's body, typically by restoring Hit Points, but sometimes by removing diseases or other debilitating effects.
VitalityEffects with this trait heal living creatures with energy from the Forge of Creation, deal vitality energy damage to undead, or manipulate vitality energy.