Bladedancer is a Hunter subclass from the original Destiny (Destiny 1), powered by Arc Light. Below are its abilities and every choice in its skill tree, as listed in the game files.
Core abilities
Use your blade.
Run faster.
Jump a second time after leaving the ground.
Charge your blade with Arc Light and consume your foes with lightning.
A powerful melee attack with extended range.
Skill tree choices
Choice 1 (pick one)
An explosive grenade which deals additional damage when attached to enemies.
A grenade which splits on impact, creating multiple projectiles which seek enemies.
A grenade that chains bolts of lightning to nearby enemies.
Choice 2 (pick one)
Upgrades Double Jump for even greater height.
Upgrades Double Jump for better directional control while in the air.
A short distance teleport that replaces Double Jump.
Choice 3 (pick one)
Press during Arc Blade to damage nearby enemies.
Press during Arc Blade to unleash a destructive wave of energy that travels along the ground.
Press during Arc Blade to disappear from sight.
Choice 4 (pick one)
Hitting an enemy from behind with Blink Strike causes significantly more damage.
Hitting an enemy with Blink Strike grants brief invisibility.
Reduces the cooldown of Blink Strike.
Choice 5 (pick one)
Training focused on toughness and speed.
Training focused on battle recovery and speed.
Training focused on battle recovery and toughness.
Choice 6 (pick one)
Increases maximum sprint speed and extends slide distance.
Weapons ready quickly.
Increases the duration of invisibility effects.
Choice 7 (pick one)
Training focused on all attributes.
Training focused on toughness at all costs.
Training focused on maximum battle recovery.
Choice 8 (pick one)
Killing an enemy with Arc Blade extends Arc Blade's duration and increases its damage for a short time.
Gain invisibility after crouching in place for a short time.
Kills with Arc Blade and Blink Strike immediately regenerate health.
Grouped the way the game groups them: in each group you can have one option active at a time.