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

Cost: 20 Arcane Power

Cooldown: 6 seconds

Gather an infusion of energy around you that explodes after 1.5 seconds for 945% weapon damage as Arcane to all enemies within 12 yards.

Mastery

Unlocked at level 19

Cost: 25 Arcane Power

Bathe yourself in electrical energy, periodically shocking a nearby enemy for 175% weapon damage as Lightning. Lasts 10 minutes.

Only one Armor may be active at a time.

Conjuration

Unlocked at level 17

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: 20 Arcane Power

Cooldown: 12 seconds

Conjure a Black Hole at the target location that draws enemies to it and deals 700% weapon damage as Arcane over 2 seconds to all enemies within 15 yards.

Mastery

Unlocked at level 61