Lightburst

In the Discipline Priest talent tree, Lightburst sits in the Priest class talents, row 3 of 10. It is a single-point node.

Connected above

The tree draws a line into Lightburst from Holy Nova.

• 
  Holy Nova

  An explosion of holy light around you deals up to (40.9% of Spell Power) Holy damage to enemies and up to (31.5% of Spell Power) healing to allies, reduced if there are more than 5 targets.

Same row

Also on this row: Leap of Faith, Improved Purify, Power Infusion, Painful Invocation and Sheer Terror or Petrifying Scream.

• 
  Leap of Faith

  Pulls the spirit of a party or raid member, instantly moving them directly in front of you.

• 
  Improved Purify

  Purify additionally removes all Disease effects.

• 
  Power Infusion

  Infuses the target with power for 15 sec, increasing haste by 20%. Can only be cast on players.

• 
  Painful Invocation
• 
  Sheer Terror

  Increases the amount of damage required to break your Psychic Scream by 25%.

• 
  Petrifying Scream

  Psychic Scream causes enemies to tremble in place instead of fleeing in fear.