Arc Warden stats, abilities and strategy
Creates a copy of himself to split push
A splintered fragment of the same primordial power as the Ancients themselves, Zet the Arc Warden has pledged to see the clash between Radiant and Dire finally end. Assault lone enemies with fluxing energy, or distort space to generate a protective field around allies. Summon a Spark Wraith to patrol an area for enemies to infuse with harmful magic, then create a double of Zet, items and all, to overwhelm your foes.
Win Rate 50.7%
Pick Rate 2.3%
Attributes
560 +52.8/lvl
363 +31.2/lvl
20 +2.4/lvl
20 +3.0/lvl
24 +2.6/lvl
Stats
Damage:
67 - 73 + 5.6/level (259 - 265 at level 30)
Range:
625
Armor:
3.3 + 0.5/level (20.2 at level 30)
Movement:
285
Roles
Carry
Durable
Nuker
Pusher
Support
Escape
Disabler
Initiator
Facets
Runed Replica
Win Rate: 47.2%
Pick Rate: 34.5%
The Tempest Double is infused with the bonuses of Power Runes for 12s when created.
Level 1 - Arcane Rune.
Level 2 - Arcane and Invisibility Runes.
Level 3 - Arcane, Invisibility, and Haste Runes.
Patch 7.39
- Tempest Double: Level 1 now grants Arcane Rune instead of Invisibility Rune
Power Capture
Win Rate: 52.5%
Pick Rate: 65.5%
Magnetic Field pulls runes. Arc Warden gains +1.5 all attributes permanently upon activating a Power Rune.
Abilities
ABILITY: Passive
Upon activating any rune, gain the Regeneration Rune buff for 4s.
Has 67% duration when activating a Bounty or Water rune.
FACET: Power Capture
Runes of Power fuse to the Self. Arc Warden gains +1.5 all attributes permanently whenever Arc Warden or the Tempest Double activates a Power Rune.
Flux
AFFECTS: Unit
DAMAGE TYPE: Magical
PIERCES DEBUFF IMMUNITY: No
PASSIVE: No
DISPELLABLE: Yes
DEBUFF: Yes
Infuses a lone enemy unit with swirling, volatile energy, dealing damage over time and slowing the target. The damage is not applied if another enemy unit is near the target.
DURATION: 6
ALLY SEARCH RADIUS: 225
DAMAGE PER SECOND: 15 / 30 / 45 / 60
MOVEMENT SPEED SLOW: 14% / 21% / 28% / 35%
16
75
500 / 600 / 700 / 800
Aghanim's Scepter
Flux silences when the target is alone, deals more damage, and lasts longer.
LEVEL 15 TALENT: +20% Flux Slow
LEVEL 10 TALENT: +200 Flux Cast Range
An infinitesimal fraction of the power which imprisoned the Ancients.
Magnetic Field
AFFECTS: Area
PIERCES DEBUFF IMMUNITY: Yes
PASSIVE: No
Arc Warden generates a circular distortion field of magnetic energy. The magnetic field grants bonus attack speed and protects allied units within it by evading attacks coming from outside the field.
RADIUS: 300
DURATION: 4 / 5 / 6 / 7
ATTACK SPEED BONUS: 30 / 60 / 90 / 120
EVASION BONUS: 100%
20 / 19 / 18 / 17
50 / 70 / 90 / 110
900
FACET: Power Capture
Magnetic Field pulls runes. Runes inside Magnetic Field automatically activate.
LEVEL 20 TALENT: -5s Magnetic Field Cooldown
LEVEL 15 TALENT: +25 Magnetic Field Attack Speed
Time and space are of little consequence to one as old as Zet.
Spark Wraith
AFFECTS: Area
DAMAGE TYPE: Magical
PIERCES DEBUFF IMMUNITY: No
PASSIVE: No
DEBUFF: Yes
Summons a Spark Wraith that slowly materializes and patrols a targeted area until an enemy comes within its range. Once a target has been found the wraith fuses with them, dealing magical damage and slowing the unit.
Spark Wraiths can not be disjointed.
SEARCH RADIUS: 375
DURATION: 16
MOVEMENT SLOW: 100%
ACTIVATION DELAY: 1.5
DAMAGE: 100 / 170 / 240 / 310
WRAITH SPEED: 550
SLOW DURATION: 0.5 / 0.6 / 0.7 / 0.8
4
80
2000
Aghanim's Shard
When Spark Wraith activates, a secondary Spark Wraith will fuse to the next closest target that deals 80% damage. Increases Spark Wraith search radius.
LEVEL 25 TALENT: -1.1s Spark Wraith Activation Delay
LEVEL 20 TALENT: +50% Spark Wraith Damage
Lesser fragments of Zet's original self.
Tempest Double
PASSIVE: No
Briefly refocusing its fractured elements into a single form, the Arc Warden is able to create a perfect electrical duplication of itself. The duplicate can use all of Arc Warden's current items and special Tempest Double versions of his spells, except most consumables and items that drop on death. The duplicate has separate item and ability cooldowns.
The Tempest Double loses its sense of self and fractures over time, becoming slower and less accurate.
Tempest Double and Refresher Orb cannot be used by the duplicate.
BOUNTY GOLD: 180 / 240 / 300
DURATION: 18 / 21 / 24
MAX MISS CHANCE: 35%
MAX SELF SLOW: 35%
60 / 55 / 50
700
FACET: Runed Replica
The Tempest Double is infused with the bonuses of Power Runes for 12s when created.
Level 1 - Arcane Rune.
Level 2 - Arcane and Invisibility Runes.
Level 3 - Arcane, Invisibility, and Haste Runes.
LEVEL 25 TALENT: Tempest Double Has No Penalties
Warped by the power of its peers, Arc Warden becomes what it despises most: disharmony.
Talents
-1.1s Spark Wraith Activation Delay
Tempest Double Has No Penalties
+ 1.2%
-5s Magnetic Field Cooldown
+ 2.4%
+50% Spark Wraith Damage
+25 Magnetic Field Attack Speed
+ 1.0%
+20% Flux Slow
+200 Health
+200 Flux Cast Range
+ 1.1%
Win Rate
Pick Rate
Patch 7.39
- Level 20 Talent Magnetic Field Cooldown Reduction decreased from 7s to 5s
- Level 20 Talent Spark Wraith Damage increased from +40% to +50%
- Level 25 Talent Spark Wraith Activation Delay Reduction increased from 1s to 1.1s
Strategy
Make use of Spark Wraiths to secure creep last hits, especially the ranged creeps.
If an opponent splits away from creeps or his ally, you can Flux him and follow up with right clicks and Spark Wraiths.
Use Spark Wraiths to scout the opponents and protect yourself while farming.
Make sure not to feed Tempest Double to opponents as it gives away a lot of gold and experience.
Use Tempest Double as frequently as possible to split push the side lanes and damage buildings.
Avoid being part of the teamfights from the very start until you get first major item that will tank you up.
Whenever opponents teleport back on a hero or two to address your split push, look to fight the remaining opponents, 
Smoke of Deceit or take Roshan.
If you are playing carry, take the Runed Replica facet. If you are playing mid, take the Power Capture facet.
Use Magnatic Field to secure runes
Counter Strategy
Arc Warden's Flux does no damage to you if you are close to another unit.
Arc Warden's Spark Wraith takes time to charge which gives you an opportunity to run away and dodge it.
Units inside Arc Warden's Magnetic Field can be hit if you are inside of it or have evasion piercing items.
Arc Warden is a weak laner. Pressure him early on.
Arc Warden's Tempest Double gives a lot of gold and experience. Kill it if possible.
Arc Warden farms the jungle a lot. Plant deep 
Observer Ward and gank him. Also block off camps with 
Sentry Ward.
Buy gap closing items to get on top of Arc Warden.
Boots of Travel allow to defend against Arc Warden's split-pushing and to quickly rejoin the team.
Once Arc Warden has 
Aghanim's Scepter, look to walk close to one of your allies or creeps when targeted by Flux to prevent the silence and damage.