Reaper is one of the two available skill trees for the Great Axe Mastery in New World. Reaper Abilities mainly focus on single-target damage, increasing movement speed and improving survivability. Great Axes mainly benefit from Strength.
All Reaper Tree Abilities in New World
Reaper Tree Active Abilities

Charge
Charge 10 meters dealing 120% weapon damage when you reach a target or press LMB. This ability grants Unstoppable, preventing you from being interrupted. Cooldown: 20 seconds.
Upgrades:
Frenzied Momentum: Charge now deals 120% to 140% damage depending on how far you traveled before reaching your target.
Unpredictable Strike: During a Charge, you can press RMB to execute a swing attack dealing 140% to 165% weapon damage depending on how far you traveled before reaching your target.

Reap
Extend your axe 5 meters, pulling foes towards you and dealing 110% weapon damage.
Taunt Gem Compatible: If you have a Carnelian gem equipped in your Greataxe, this ability causes a 4s taunts when it hits. (Taunt causes monsters to focus only on you) Cooldown: 18 seconds.
Upgrades:
The Collector: Reap's range is now 8 meters.
Hunger: Heal yourself for 30% of the damage done by Reap.
Fatal Attraction: After you pull do a spin attack dealing 115% weapon damage.

Execute
A powerful overhead attack dealing 200% weapon damage. Execute deals 30% more damage against enemies below 50% health. Cooldown: 25 seconds.
Upgrades:
Unstoppable Greed: Execute gains Grit during the attack, making the attack unstoppable
Executioner:Excecute ciritcal hits 100% of the time against foes below 30% health
Reaper Tree Passive Abilities

Critical Gains
When you deal a critical hit with a Great Axe, you heal yourself for 10% of the damage done.

Frustration
After one of your attacks is blocked, gain 15% damage for 10 seconds. (Max 1 stack)

Keen Edge
Critical damage increased by 10%

Feed
Great Axe attacks on foes below 30% health heal you for 10% of damage done.

Greed
Light Attacks with your Great Axe 10% give you 5% damage for 5 seconds. (Max 3 stacks)

Death's Embrace
Great Axe attacks against foes below 50% health: penetrate armor by 10%

Critical Condition
Great Axe attacks against foes below 30% health : critical 15% more often

Executioner's Speed
Hittin 2+ targets with a single Great Axe light attack swing grants 3s of 20% Haste (You move faster.)

Blood Lust
You move 30% faster and deal 15% more damage when looking at a foe within 15 meters.