Grace is one of the two available skill trees for the Rapier Mastery in New World. Grace abilities mainly focus on evasion and mobility, rendering the player character harder to hit. Rapiers mainly benefit from Dexterity, and Intelligence also contributes although on a secondary level.
All Grace Tree Abilities in New World
Grace Tree Active Abilities

Evade
Perform a small, reliable sidestep in your current movement direction that cancels any current activity and provides momentary invulnerability. 'Light Attack's made during Evade are performed exceptionally fast.
Cooldown: 6 seconds
Upgrades:

Breathe In
Gain 20 stamina immediately on use.
Allegro
Gain 20% movement speed for 3 seconds on use
Adagio
Evading forward gains 15% increased damage on your next light attack. Ends on hit or after 1 second.
Crescendo
Individual successful light attacks reduce the cooldown of this ability by 30% each

Riposte
Enter into a defensive stance for 1s. If struck during this ability, counter the attacker dealing 50% weapon damage and stunning them briefly for 2s. You are briefly invulnerable upon a successful Riposte. Taunt Gem Compatible: If you have a Carnelian gem equipped in your rapier, this ability inflicts taunt for 4s to all foes within 5m. (Taunt causes monsters to focus only on you.)
12s Cooldown
Upgrades:

Insult to Injury
If the Riposte is triggered successfully, all your attacks become uninterruptible for 3 seconds.
Priority
Reduce the cooldown of other Rapier abilities by 20% when landing a Riposte stun.
Lasting Consequence
Increase the stun from Riposte to 2.5 seconds

Fleche
Leave the ground lunging forward for 10m in a stabbing motion piercing through enemies dealing 145% damage.
Cooldown: 17 seconds
Upgrades:

Quick Lunge
Killing with this ability reduces its cooldown by 80%.
Backside
After performing Fleche, your next critical strike attack will have its damage increased by 15%. Lasts for 5 seconds
Interruption
Pressing 'Light Attack' any time during Fleche will stop and perform a static, continuation attack dealing 115% damage.
Grace Tree Passive Abilities

Desperation
Deal 10% more damage when your stamina is below 40%.

Red Curtains
Critical strikes reduce all cooldowns by 5%.

Controlled Breathing
+3 stamina on any hit.

Perfectionist
Deal 10% more damage when your health is full.

Swiftness
+3% Haste for 4 seconds on any hit. Can stack up to 5 times.

Momentum
Gain 30% increased damage on your next light or heavy attack after performing an ability. Ends on hit or after 3 seconds