Glacial Spike

Cast out a shard of ice that explodes on impact, causing enemies within 4.5 yards to take 175% weapon damage as Cold and be Frozen for 1 second.

Enemies cannot be Frozen by Glacial Spike more than once every 5 seconds.

Unlocked at level 13

Storm Chaser

Each cast of Energy Twister grants you a Lightning Charge. You can store up to 3 Lightning Charges at a time. Casting a Signature spell releases all Lightning Charges as a bolt of Lightning that deals 196% weapon damage as Lightning per Lightning Charge.

Energy Twister's damage turns into Lightning.

The following skills are Signature spells:

Magic Missile

Shock Pulse

Spectral Blade

Electrocute

Unlocked at level 52

Calamity

Cast a short range Wave of Force upon arrival, dealing 175% weapon damage as Arcane to all nearby enemies and stunning them for 1 second.

Unlocked at level 59

Apocalypse

Increase the area of effect of Blizzard to a 30 yard radius.

Blizzard's damage turns into Fire.

Unlocked at level 54

Force Armor

Incoming attacks that would deal more than 35% of your maximum Life are reduced to deal 35% of your maximum Life instead.

The amount absorbed cannot exceed 100% of your maximum Life.

Unlocked at level 54

Conduit

Enemies hit by your attacks restore up to 3 Arcane Power.

Unlocked at level 38