The Nightstalker is the new sub-class for the Hunter, and is a sub-class obtained by completing the quest, The Nightstalker's Trail. 

As you'll note below, the Nightstalker has an incredibly powerful Super that allows him to tether enemies to a single location. Unsurprisingly, this is incredibly powerful in a Raid environment as it allows Nightstalker's to control the flow of enemies that are attempting to attack. Alongside this, the Nightstalker gains a powerful set of Grenades and melee modifiers to make him a powerful addition to PvP.

Grenades

• Spike Grenade: A grenade that attaches to any surface and emits a torrent of damaging void light.
• Voidwall Grenade: A Grenade that creates a horizontal wall of burning void light.
• Vortex Grenade: A grenade that creates a vortex which continually damages enemies inside the sphere.

Class Ability Modifiers (Dodge)

• Gambler’s Dodge: Dodging near enemies generates Melee energy.
• Marksman Dodge: Automatically reload your equipped weapon while dodging.

Movement

• Jump a second time after leaving the ground

Modifiers

• Better Control: Upgrades Double Jump for better directional control.
• Triple Jump: Upgrades Double Jump with a third jump.
• High Jump: Upgrades Double Jump for even greater height.

Super

• Shadow Shot: Tether a large group of foes to a Void Anchor, slowing and silencing them for your fireteam.

Modifiers

• Blood Bound: Tethered enemies explode when killed. Damage to tethered enemies is shared to all.
• Black Hole: The Void Anchor has increased range, lasts significantly longer, and can tether more targets.
• Quiver: Fire Shadowshot up to three times. Void Anchors have reduced range.

Melee

• Smoke: Throw smoke to slow and disorient those within its cloud.

Modifiers

• Envenomed: Adds a toxin that damages enemies within the smoke.
• Vanish in Smoke: You and allies near Smoke explosions vanish from sight.
• Snare: Allows smoke to stick to surfaces, detonating when enemies are near.

Class Modifiers

• Path Forgotten: Training focused on toughness and speed.
• Path Forbidden: Training focused on battle recovery and speed.
• Path Unknown: Training focused on battle recovery and toughness.

Ability Modifiers

• Courage of the Pack: Killing tethered targets increases Recovery and Armor for you and nearby allies. Stacks up to 5 times.
• Light of the Pack: Killing tethered targets creates Orbs of Light for your allies.
• Lockdown: Grenade and Smoke effects last twice as long, allowing strong territory control.

Attribute Modifiers

• Way of the Drifter: Training focused on all attributes.
• Way of the Fearless: Training focused on toughness at all costs.
• Way of the Nomad: Training focused on maximum battle recovery.

Ability Modifiers

• Keen Scout: Sprint and Sneak faster, gain Enhanced Tracker, and ability to Mark targets you damage.
• Predator: The Void Anchors fired from Shadowshot become traps that stick to surfaces and wait for prey.
• Shadestep: Press Crouch, Crouch to evade.