This is a Signature spell. Signature spells are free to cast.

Summon a spectral blade that strikes all enemies up to 15 yards in front of you for 168% weapon damage as Arcane.

Primary

Unlocked at level 11

Cost: 15 Arcane Power

Summon a multi-headed Hydra for 15 seconds that attacks enemies with bolts of fire dealing 165% weapon damage as Fire.

Only one Hydra may be active at a time.

Force

Unlocked at level 21

Cooldown: 11 seconds

Teleport through the ether to the selected location up to 50 yards away.

Defensive

Unlocked at level 22

Cooldown: 120 seconds

Transform into a being of pure arcane energy for 20 seconds. While in Archon form, your normal abilities are replaced by powerful Archon abilities, your damage is increased by 30%, and your Armor and resistances are increased by 150%.

Each enemy killed while in Archon form increases your damage by 6% for the remaining duration of Archon.

Mastery

Unlocked at level 30

Cost: 25 Arcane Power

Imbue your weapon with magical energy, granting it 10% increased damage. Lasts 10 minutes.

Requires Weapon

Conjuration

Unlocked at level 20

Cost: 25 Arcane Power

Focus your energies, increasing your Armor by 35% but decreasing your maximum Arcane Power by 20. Lasts 10 minutes.

Only one Armor may be active at a time.

Conjuration

Unlocked at level 28