A Boon is a type of limited-duration, positive effect; its counterpart is a condition, a limited-duration negative effect. Stacking a boon additively increases its duration; some boons also increase in intensity.
Boons have characteristic orange colored icons which appear on the top row of active effects, shown to the right of your health orb in the user interface. Each boon is surrounded by a white outline indicating the time left before the boon expires. Placing your mouse on the boon's icon will also show the remaining time.
 List of boons
|Aegis||Block the next attack. Stacks in duration.|
|Fury||20% critical chance increase. Stacks in duration.|
|Might||X power and condition damage increase. Stacks intensity.|
|Protection||33% damage reduction. Stacks in duration.|
|Regeneration||Regenerates X health per second. Stacks in duration.|
|Retaliation||Reflects incoming damage back to its source each time they hit you. Stacks in duration.|
|Stability||Cannot be knocked down, pushed back, launched, stunned, dazed, floated, sunk, or feared. Stacks in duration.|
|Swiftness||33% movement speed increase. Stacks in duration.|
|Vigor||Faster endurance regeneration. Stacks in duration.|
Dozens of skills can grant specific boons. To find out which skills grant a certain boon, refer to the page on the boon itself.
The following is a list of skills which grant and affect non-specific boons.
 Skills that grant random boons
 Skills that remove boons
- Mind Spike (chained from Mind Slash); 1 from up to 3 foes
- Mind Stab; 1 from up to 5 foes
- Spinal Shivers; 3 from target foe
- Flanking Strike; 1 from target foe (first strike only)
- Null Field; all from foes in the area
- Phantasmal Disenchanter; multiple from foes
- Throw Mine; one from foes that are hit
- Profession Mechanics
- Mine Field; remove one boon for each mine
 Skills that transfer boons
- Arcane Thievery; 3 from foe to self
- Signet of Inspiration; copies all from you to nearby allies (active)
 Skills that transform conditions into boons
- Contemplation of Purity; all on self
- Elixir C; all on self
- Well of Power; multiple per pulse on allies in the area
 Skills that transform boons into conditions
To see a list of traits which affect a specific boon, refer to the page related to that boon. The following is a list of traits that affect or are affected by non-specific boons.
- Searing Flames : When you apply burning to an [sic] foe, remove a boon. This effect can only trigger once every 20 seconds.
- Altruistic Healing : You are healed whenever you apply a boon to allies.
- Power of the Virtuous : Deal extra damage for each boon you have.
- Empowered : Deal extra damage for every boon on you.
- Quick Breathing : Warhorn skills recharge 20% faster. Warhorn skills convert 1 condition into a boon.
- Transmute : 8% chance to convert incoming conditions into boons.
- Energy Conversion Matrix : Deal extra damage for each boon you have.
- Fortifying Bond : Any boon you get is shared with your pet.
- Bountiful Hunter : You and your pet deal 5% more damage while you have a boon.
- Concentration Training : Boons applied by your pets last longer.
- Bountiful Theft : Stealing removes 2 boons from your target and grants them to nearby allies.
- Bountiful Power : +2% damage per boon on you.
- Bountiful Interruption : Apply a random boon to yourself when you interrupt an enemy.
- Shattered Concentration : Shatter skills remove boons.
- Necromatic Corruption : Minions have a 10% chance to remove boon when they attack.
To find equipment which affect specific boons, refer to the page on the boon itself. The following is a list of equipment that affect non-specific boons.
 Upgrade components that grant boons
- Major Rune of Lyssa (rank 4); 1 on heal.
- Superior Rune of Lyssa (rank 4); 1 on heal.
- Superior Rune of Lyssa (rank 6); all on elite skill.
 Upgrade components that extend boons
- Rune of the Monk (rank 2).
- Rune of the Water (rank 2).
- Rune of Sanctuary (rank 2, only for minor and major runes).
- Rune of Altruism (rank 4).
 Upgrade components that remove boons
- Superior Sigil of Nullification; chance on critical hit
- Some NPCs have a permanent boon called Determined, which makes them unable to die.
- Boon duration is capped after a certain limit.
- Boons replace the enchantments from the original Guild Wars and are designed to simplify the buff system.