Mystery no More

Ok, so I was in Un Goro with Saph about the time the expansion came out so I was outta there and to the outlands in no time. I never completed this quest.

Apparently if you continue the quest you can get:

Crystal Force = 10 green and 10 blue power crystals
Increases Spirit by 30 for 30 minutes

Crystal Charge = 10 red and 10 yellow power crystals
383 to 517 fire damage to targets within 3 yards

Crystal Spire = 10 blue and 10 yellow power crystals
Forms a crystal shield around the user and inflicts 12 damage to anyone that hits the user. Lasts 10 minutes

Crystal Ward = 10 red and 10 green power crystals
Increases armor by 200 for 30 minutes

Crystal Yield = 10 red and 10 blue power crystals
decreases your target's armor by 200 for 2 minutes.

Is it worth it, or is it an addiction? The jury is still out.