Willpower relies heavily on passive powers, with little in the way of flashy animations, to represent the stereotypical "tough guy". The set offers decent resistance to smashing, lethal, psi and toxic damage, as well as poor resistance but decent defense to fire, cold, energy and negative energy. The set also offers a taunt aura called "Rise to the Challenge" that raises regeneration for every enemy in melee.
You aren't Invulnerable. Bullets don't bounce off of you, and if you are cut, you bleed. You are, however, tough, grizzled and strong willed. It takes more than a little cut to keep you down! Willpower offers a strong balance of healing, damage resistance and defense. While you have no real vulnerabilities, you can't quite deal with 'alpha strikes' as well as some other protective powers.
You become more aware of your environment and its hazards while this power is activated. This will increase your Defense versus environmental damage as long as it is active. Your Heightened Senses also allow you to perceive stealthy foes and resist Defense Debuffs.
Hide makes you almost impossible to detect. When properly 'Hidden', a Stalker can pull off Critical hits with his attacks, and even land a massive 'Assassins Strike' with an Assassins power. When you attack or are damaged while using this power, you will be discovered. Even if discovered, you are hard to see and retain some bonus to Defense. Unlike most stealth powers, Hide can be used at the same time as other Concealment powers, giving you even greater stealth capability. No Endurance Cost.
Should you fall in battle, you can Revive yourself from the brink of death. You will revive with most of your hit points and half your endurance and be protected from experience debt for 20 seconds. Additionally, for 90 seconds, your damage and accuracy will be improved, then for another 45 seconds, your damage and accuracy will be diminished.
The more the odds are against you, the more determined you become. When surrounded by foes, your ability to regenerate health increases greatly. Additionally, your resolve and the look in your eye is enough to leave most foes shaken, so their attacks are less accurate. The first foe you engage in melee grants the highest regeneration bonus, and up to 10 foes can contribute to this effect.
When you activate this power, you not only become extremely resistant to most damage, but also to Disoreint, Immobilization, Hold, Knockback, Repel and Sleep effects. Strength of Will costs little Endurance to activate, but when it wears off you are left exhausted, and substantially drained of Endurance.