Defender is a Titan subclass from the original Destiny (Destiny 1), powered by Void Light. Below are its abilities and every choice in its skill tree, as listed in the game files.
Core abilities
Deliver a shattering blow with your most reliable sidearm: your right fist.
Run faster.
Jump and then press again while in the air to activate Lift.
Shape Void Light into an indestructible shield to protect you and your allies.
Replenishes grenade and melee energy on activation.
Killing an enemy with this powerful melee attack creates a Force Barrier around you which absorbs incoming damage.
Skill tree choices
Choice 1 (pick one)
A grenade that attaches to enemies and explodes twice.
A grenade that attaches to any surface and emits a torrent of damaging Void Light.
An explosive grenade that prevents enemies from using abilities for a short time.
Choice 2 (pick one)
Upgrades Lift to carry you higher.
Upgrades Lift for better directional control while in the air.
Upgrades Lift to provide a strong initial burst of momentum.
Choice 3 (pick one)
While inside Ward of Dawn you and your allies gain significant damage resistance.
Passing through Ward of Dawn grants you and your allies a temporary shield.
Passing through Ward of Dawn grants you and your allies a temporary increase to weapon damage.
Choice 4 (pick one)
While Force Barrier is active all your weapons reload and ready blindingly fast.
While Force Barrier is active all your melee kills create Orbs of Light.
Force Barrier continually recharges.
Choice 5 (pick one)
Training focused on battle recovery and toughness.
Training focused on speed and toughness.
Training focused on battle recovery and speed.
Choice 6 (pick one)
Increases the duration of Ward of Dawn.
Increases the strength and duration of Force Barrier.
As Ward of Dawn takes damage from enemy fire it creates additional Orbs of Light.
Choice 7 (pick one)
Training focused on all attributes.
Training focused on maximum recovery.
Training focused on raw speed.
Choice 8 (pick one)
Reduces the cooldown time of Ward of Dawn.
Heavy Weapon kills have a chance to create Orbs of Light for your allies.
Increases the benefits granted by Blessing of Light and Weapons of Light.
Grouped the way the game groups them: in each group you can have one option active at a time.
