Whirlwind Attack is a Hunter Ranger class action. This ability allows Hunters to attack an aoe radius with their melee attack rather than a single target.
Description
Strike out at all nearby foes, making separate 
Attack rolls against each target.
Properties
- Cost
Action- Damage
- Normal weapon damage
- Details
- Attack roll
AoE: 2.2 m / 7.2 ft (Radius)
How to learn
Classes:
- Class level 11: Hunter
Notes
- This is used essentially in place of a normal melee attack. It can't hit party members, but it will hit other friendly NPCs. Otherwise, there is no drawback to using this over a normal melee attack.
- The radius is 2.2 m while the corrsponding ranged attack Volley has the range of 3 m.
- Extra Reach does not increase the radius of Whirlwind.
- Some properties of items are applied to every creature which is hit but some are applied only to a single creature.
- There does not seem to be a simple rule which is hit if only a single creature is hit.
- It is not obvious which properties apply to every and which only to a single creature.
- Here is a list of some useful properties which are applied to every hit enemy:
Amulet of Bhaal: Bleed
Bloodthirst: Piercing vulnerability
Braindrain Gloves: Mental Fatigue- Coatings
- Encrusted with Frost (Condition)
Gloves of Baneful Striking: 1d4 penalty to saving throws
Gloves of Power: Bane
Helmet of Arcane Acuity: Arcane Acuity
Jagged Spear: disadvantage on Constitution saves
Loviatar's Scourge: AoE Necrotic damage
Punch-Drunk Bastard: AoE Thunder damage- Radiating Orb (Condition)
Ring of Spiteful Thunder: Daze
Shattered Flail: healing
Sword of Chaos: healing
The Skinburster: Force Conduit
Vision of the Absolute: Blind
Staff of the Ram: Stun
Trident of the Waves: Wet
- Here is a list of some useful properties which are applied only to a single creature:
Hat of Fire Acuity: Arcane Acuity- Hat of Storm Scion's Power: Arcane Acuity
Nature's Snare: Ensnare- Reverberation
Ritual Axe: Bane
Snowburst Ring: Ice surface- Staff of the Ram: Stun