Attack Speed

Attack Speed decreases the startup time of an autoattack and the cooldown time between each attacks. In simpler terms, it determines how fast a unit can attack. Attack speed is based on a unit's Base Attack Time, and is increases with Agility, attack speed stats, and abilities.

Base Attack Time

Base Attack Time determines how fast a unit attacks without any attack speed modifiers. BAT is measured in seconds between each attack. The lower the BAT, the faster the attack.

All heroes have a BAT of 1.7 except the following:

Hero	Base Attack Ttime
War Beast (w/ Metamorphosis)	1.4
Magebane	1.6
Pebbles (w/ Level 1 Enlarge)	1.9
Pebbles (w/ Level 2 Enlarge)	2.1
Pebbles (w/ Level 3 Enlarge)	2.3

Formula

Attack Time = BAT / ((1 + (AS / 100)) * %AS * %AS Slow)

Attacks per Second = ((1 + (AS / 100)) * %AS * %AS Slow) / BAT

Simply put, +1 AS is equal to a 1% increase to your attack speed, and vice versa. 1 point of Agility grants +1 AS.

Almost all forms of attack speed buffs or debuffs are additive or subtractive. In case of percentage AS modifiers, it multiplies your total AS modifiers by the percentage, multiplying by percentage AS increases, then percentage AS slows, like Movement Speed modifiers.

Attack Speed required to increase attacks per second

Since HoN's servers run at 20 frames per second, a unit must reach the next 'step' in the server frame when attacking faster than once per second in order to receive an actual increase in damage output.

This chart lists the amount of +Attack Speed required to increase actual attacks per second. This chart only applies to heroes with 1.7 BAT.

Frames per attack	Seconds per attack	Attacks per second	+AS required
20	1.00	1.00	+70
19	0.95	1.05	+79
18	0.90	1.11	+89
17	0.85	1.18	+100
16	0.80	1.25	+113
15	0.75	1.33	+127
14	0.70	1.43	+143
13	0.65	1.54	+163
12	0.60	1.67	+183
11	0.55	1.82	+209
10	0.50	2.00	+240
9	0.45	2.22	+278
8	0.40	2.50	+325
7	0.35	2.85	+386
6	0.30	3.33	+467
5	0.25	4.00	+580
4	0.20	5.00	+750
3	0.15	6.66	+1033
2	0.10	10.0	+1600
1	0.05	20.0	+3300

Attack Speed Sources

Items

Item	+Attack Speed	+Agility	Total AS increase
Elder Parasite (w/ active)	15 + 90	0	105
Hypercrown	90	0	90
Wingbow	30	32	62
Daemonic Breastplate	30 + 25 (from Aura)	0	55
Geometer's Bane	25	26	51
Genjuro	20	30	50
Thunderclaw	45	0	45
Warpcleft	45	0	45
Dawnbringer	20	16	36
Faux Bow	30	6	36
Frostburn	20	16	36
Searing Light	20	16	36
Insanitarius (toggled)	25 + 10	0	35
Hellflower	35	0	35
Firebrand	15	16	31
Alacrity Band	30	0	30
Alchemist's Bones	30	0	30
Spiked Bola	0	30	30
Steamboots (Agility)	20	10	30
Nullfire Blade	0	26	26
Dancing Blade	0	25	25
Insanitarius (untoggled)	25	0	25
Steamboots (Non-Agility)	20	0	20
Elder Parasite	15	0	15
Gloves of the Swift	15	0	15
Harkon's Blade	15	0	15
Null Stone	0	15	15
Master's Legacy	0	10	10
Restoration Stone	15	0	15
Arcana	10	0	10
Assassin's Shroud	10	0	10
Blessed Orb	0	10	10
Frostwolf's Skull	0	10	10
Grimoire of Power	0	10	10
Quickblade	0	10	10
Steamstaff	10	0	10
Staff of the Master	0	10	10
Twin Blades	10	0	10
Codex (Level 5)	0	8	8
Iron Shield	0	8	8
Sacrificial Stone	0	8	8
Codex (Level 4)	0	7	7
Codex (Level 3)	0	6	6
Fleetfeet	0	6	6
Madfred's Brass Knuckles	0	6	6
Soulscream Ring	0	6	6
Astrolabe	0	5	5
Codex (Level 2)	0	5	5
Dreamcatcher	0	5	5
Void Talisman	0	5	5
Codex (Level 1)	0	4	4
Energizer	0	4	4
Major Totem	0	4	4
Amulet of Exile	0	3	3
Fortified Bracer	0	3	3
Plated Greaves	0	3	3
Ring of Sorcery	0	3	3
Soultrap	0	3	3
Duck Boots	0	3	3
Refreshing Ornament	0	2	2
Grave Locket	0	2	2
Pretender's Crown	0	2	2
Shield of the Five	0	2	2
Minor Totem	0	1	1
Orb of Zamos	0	1	1

Abilities

Unit	Source	Target	+Attack Speed	Duration	Notes
Aluna	Emerald Lightning	Self	50/75 per charge	5/10 seconds	AS per charge and duration increased with Emerald Red active; Gains a charge per unit hit; Hits up to 2 times
Accursed	Sear	Ally Units	10/20/30/40	4.5 seconds	Applies when attacking a unit with Sear applied or casting an ability on an ally unit
Berzerker	Mark for Death	Self	40	N/A	Applies while facing marked target; 1.5 second lingering time
Blacksmith	Frenzy	Ally Unit	20/30/40/50	30 seconds
Bushwack	Jungle Toxin	Self	10/15/20 per charge	3 seconds	Charges are reset when switching target (non-SotM version only)
Dampeer	Bloodthirst	Passive	10 per Essence	N/A
Deadlift	Onslaught	Non-hero Units	20/40/60/80	6 seconds	Removed when target dies
Deadwood	Clearcutting	Self	15 per charge	12/14/16/18 seconds	Maximum of 1/2/3/4 charges
Dreadbeetle Queen	Mania	Ally Units (Aura)	15	N/A
Empath	As One	Ally Hero	40/60/80	Up to 30 seconds	Applies to target while bonded, Empath can end the bond between her and the host early
Forsaken Archer	Split Fire	Passive	15/20/25/30	N/A
Gawain	Forest's Touch	Emerald Warden	40	5 seconds	Casts when Emerald Warden is below 40% Health
Ichor	Bloodrush	Ally Heroes (Aura)	40 + 10/15/20 per ally hero	10 seconds
Kane	Face Off	Self	25/50/75	3.5/4.5/5.5 seconds	Duration refreshes when both units clash; Removed when target unit dies
Keeper of the Forest	Strength in Numbers	Passive	5/10/15/20 per charge	N/A	Adds 1 charge per nearby Animated Tree; maximum of 5 charges
Legionnaire	Terrifying Charge	Enemy Units	50%	4/5/6/7 seconds	Also reduces damage dealt by 50%
Maliken	Hellbourne Zeal	Passive	0.5/1/1.5/2 per charge	N/A	Gains 1 charge per 1% of Health missing
Malphas	Burning Sword	Passive	20/40/60	N/A
Master of Arms	Cheetah	Self	0/100/175/250/325	N/A
Master of Arms	Master's Call	Self	50/100/150	N/A	Applies while Cheetah is equipped
Xemplar	Echo Strikes	Self	30/40/50/60 + 10/15/20/25 per charge	8 seconds	Adds 1 charge per nearby illusions; applies after using ability
Minotaur	Attack Speed Aura	Ally Units (Aura)	15	N/A
Nitro	Divide & Conquer	Self	0/15/30/45/60	3 seconds	Applied when hitting an enemy hero with Ballistic
Nomad	True Strike	Self	20/40/60/80	3 seconds
Parasite	Infest	Self	20/40/60/80	N/A	Applies to the unit you are Infesting
Predator	Terror	Ally Units	25/50/75 (50/75/100)	3.5 seconds	Applies when attacking a unit with Terror applied
Pyromancer	Fervor	Self	20/40/60/80 per charge	6 seconds	Maximum of 3 charges
Ravenor	Storm Blades	Self	30/60/90/120	2 Attacks or 6 seconds
Sand Wraith	Enkindle	Passive	15/30/45/60	N/A
Sapphire	Quickshield	Self	20/35/50/65	Up to 10 seconds	Removed when shield is broken
Scout	Vanish	Self	75/150/225/300	4 attacks or 4 seconds	Applies after coming out of Stealth
Silhouette	Relentless Salvo	Self	400	2 attacks or 4 seconds	Applies after casting an ability
Solstice	Shadow Dash	Self	150/200/250/300	3 attacks or 4 seconds
Tarot	Far Scry	Self	100	2/3/4/5 attacks or 15 seconds
The Dark Lady	Charging Strikes	Self	30/45/60/75	6 seconds
The Madman	Berserk	Self	40/80/120 (80/120/160)	25 seconds
Tundra	Cold Shoulder	Ally Units	20/40/60/80	2 seconds	Applies when attacking a unit with Cold Shoulder applied
Valkyrie	Courageous Leap	Ally Units	5/10/15/20	10 seconds
War Beast	Battle Cry	Ally Units	5/10/15/20	20 seconds
Wildsoul	Wild	Owned Units	20/40/60/80	45 seconds	Bonus Attack Speed halved after 10 seconds

Attack Speed reducers

Flat reducers

Unit	Source	Target	-Attack Speed	Duration	Notes
Aluna	Emerald Lightning	Enemy Unit(s)	50/75	5/10 seconds	AS reduction and duration increased with Emerald Red active
Arachna	Webbed Shot	On Attack	10/20/30/40	3 seconds
Arachna	Spider Sting	Enemy Unit	40/60/80	1.5 seconds	Spiderling has a 1.0 BAT and lasts 5 attacks or 15 seconds
Blitz	Lightning Shackles	Enemy Units	100	4 seconds	Boosted version only
Booboo	Swipe	Enemy Units	50	1 second
Bushwack	Jungle Toxin	Enemy Unit	10/15/20 per charge	3 seconds	Max -50 Attack Speed
Catman Champion	Wild Strike	Enemy Units	25	3 seconds
Doctor Repulsor	Electric Frenzy	Enemy Units	50	0.6 seconds
Frostwolf's Skull	Attack Modifier	Passive	30 or 20	3 seconds	-30 AS when applied by melee heroes, -20 AS if applied by ranged heroes; Applies On Attack, Activation, and with single-target abilities
Glacius	Glacial Downpour	Enemy Units	20	1.5 seconds
Glacius	Tundra Blast	Enemy Units	20	3/3.5/4/4.5 seconds
Hellbringer	Evil Presence	Enemy Units	20/30/40/50	5 seconds
Ichor	Bloodrush	Enemy Heroes (Aura)	20/40/60	10 seconds
Plague Rider	Plague Carrier	Enemy Units	20	4 seconds
Sporespitter	Spore Launcher	On Attack	20	1.5 seconds
Tundra	Avalanche	Enemy Units	50	2/3/4 seconds	Applies to units between Tundra and the target
Vulture Lord	Tornado	Enemy Units	15	N/A	Applies to units inside Tornado

Attack Speed Slow

Unit	Source	Target	-Attack Speed	Duration	Notes
Chronos	Chronofield	Ally Units	80%	4/5/6 seconds	SotM version only; Applies while ally is inside Chronosphere
Cthulhuphant	Dreams of Madness	Enemy Units (Aura)	10%	N/A	Applies to enemies within 400 radius while active
Gauntlet	Enfeeble	On Attack	1% per charge	4 seconds	Maximum of 40 charges
Riptide	Watery Grave	Enemy Unit	50%	2/2.5/3/3.5 seconds
The Chipper	Tar Toss	Enemy Units	Up to 10/20/30/40%	2/3/4/5 seconds	Reduces AS by .1/.2/.3/.4% per charge