Ride Lightning is learned in the Evocation school of magic.

The caster summons a bolt of lightning, grabs it and rides it into the sky, then rides the next bolt of lightning down, arriving at a random location nearby.

In addition, you will receive the Power Surge effect, which increases your Spell Power by 20% for 2 minutes.

It is cast instantly, but you will be unbalanced for a while upon landing. The spell can be risky, as it will teleport you into a random room in your current area, regardless of whatever monsters or other hazards may await.