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

Convergence

Increase the width of the beam allowing it to hit more enemies.

Disintegrate's damage turns into Fire.

Unlocked at level 26

Power of the Storm

Reduce the Arcane Power cost of all skills by 3 while Storm Armor is active.

Unlocked at level 33

Molten Impact

Greatly increases the size and increases the damage of the Meteor impact to 1648% weapon damage as Fire and the molten fire to 625% weapon damage as Fire over 3 seconds.

Adds a 15 second cooldown.

Unlocked at level 58

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

Deflection

When you perform an attack, gain a protective shield for 3 seconds that absorbs 4% of your Life in damage.

Unlocked at level 55