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Kelen's Dagger cannot be held by Butcher or Vengeful Spirit
Buyable from Goblin Merchant

Blink
Teleports the caster to a nearby location instantly
1200 range
Cannot be used if the carrier was damaged by an enemy player-controlled unit in the last 3 seconds
Self damage does not disable Blink, but damage from Roshan does
Costs 75 mana, has an 14 second cooldown

Barrier
Gives allied units within 500 range a shield that blocks 400 spell damage
Lasts 10 seconds, costs 100 mana, and has a 60 second cooldown
Does not affect units that have been affected by Barrier in the last 50 seconds

Stacks with itself in inventory
1 charge

Regenerate Mana
Restores 100 mana over 30 seconds
Effect ends if affected unit takes damage
You can target an ally or yourself to receive the effect
Double clicking the item will cause it be used on yourself

Spell Block
Blocks most targeted spells once every 20 seconds

Wind Walk
Makes you invisible until the duration ends, or until you attack or use an ability
While invisible you move 20% faster and can move through units
Has a 0.3 second fade time
Attacking to break the invisibility will cause you to deal 150 bonus physical damage on your attack
Lasts 9 seconds, costs 75 mana, and has an 18 second cooldown

Chain Lightning
Gives a 25% chance on attack to release a Chain Lightning that hits several units
Hits 4 units, dealing 120 magical damage to each, 500 bounce range
Orb effect on regular attacks, orb effect and buff placer on proc

Buyable from Goblin Laboratory
Gains 1 charge every time a visible enemy unit casts an ability in a 1200 AoE
Maximum of 10 charges
Certain abilities, such as arrow abilites (Frost Arrow, Poison Attack, etc) and item abilities, will not add a charge

Energy Charge
Restores 15 HP and mana for each charge

Gains 1 charge every time a visible enemy unit casts an ability in a 1200 AoE
Maximum of 15 charges
Certain abilities, such as arrow abilites (Frost Arrow, Poison Attack, etc) and item abilities, will not add a charge

Energy Charge
Restores 15 HP and mana for each charge

Movespeed and attack speed bonus does not stack with Yasha, Sange and Yasha, or Manta Style
Can be disassembled

Mirror Image (melee)
Creates 2 images that deal 33% damage and take 350% damage
Has a 0.1 second animation delay for which you are invulnerable
Lasts 20 seconds, costs 165 mana, and has a 35 second cooldown

Mirror Image (ranged)
Creates 2 images that deal 28% damage and take 400% damage
Has a 0.1 second animation delay for which you are invulnerable
Lasts 20 seconds, costs 165 mana, and has a 50 second cooldown

Lifesteal
Gives 17% Lifesteal on attacks
Orb effect

Berserk
Gives +100 attack speed and +25% movement speed but causes you to take 30% extra damage
Lasts 12 seconds, costs 25 mana, and has a 25 second cooldown

Valor
Target enemy and you lose 6 armor
Lasts 7 seconds, has a 7 second cooldown, and a 800 cast range

Mekansm Aura
+4 HP regeneration
500 AoE

Restore
Heals 250 HP and gives +2 armor in 750 AoE
Armor bonus lasts 25 seconds
Heal does not affect units that have been healed by any Restore in the last 25 seconds
Costs 150 mana, and has a 45 second cooldown