Diablo® III

Cost: 15 Arcane Power

Summon a multi-headed Hydra for 15 seconds that attacks enemies with bolts of fire dealing 28% weapon damage as Fire. You may only have one Hydra active at a time.

Force

Unlocked at level 21

Cost: 16 Arcane Power

Hurl a barrage of arcane projectiles that deal 285% weapon damage as Arcane to all enemies near the impact location.

Secondary

Unlocked at level 12

Cooldown: 15 seconds

Invoke a bubble of warped time and space for 8 seconds, reducing enemy attack speed by 20% and movement speed by 60%. This bubble also slows the movement of enemy projectiles by 90%.

Defensive

Unlocked at level 16

Cooldown: 15 seconds

Transform your skin to diamond for 6 seconds, absorbing up to 5220 damage from incoming attacks.

Defensive

Unlocked at level 8

Cost: 25 Arcane Power
Cooldown: 120 seconds

Transform into a being of pure Arcane energy for 15 seconds. While in Archon form, your normal abilities are replaced by powerful Archon abilities, and your Armor and resistances are increased by 40%. Every enemy killed while in Archon form adds 1 seconds to the duration of Archon.

Mastery

Unlocked at level 30

Cost: 20 Arcane Power

Summon a companion that will attack your targets for 20% weapon damage as Arcane. This companion cannot be targeted or damaged by enemies and lasts for 5 minutes.

Conjuration

Unlocked at level 22