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

Safe Passage

For 5 seconds after you Teleport, you will take 25% less damage.

Unlocked at level 26

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

Force Weapon

Increase the damage bonus of Magic Weapon to 20% damage.

Unlocked at level 35

Arcanot

While the Familiar is active, you regenerate 4.5 Arcane Power every second.

Unlocked at level 50