Rondurmancy

In the Arcane Mage talent tree, Rondurmancy sits in the Sunfury hero talent tree, row 4 of 5. It is a single-point node.

Connected above

The tree draws a line into Rondurmancy from Lessons in Debilitation or Explosive Potential.

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  Lessons in Debilitation

  Your Arcane Phoenix has picked up a few tricks, and will Spellsteal when it is summoned and when it expires.

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  Explosive Potential

  After casting Arcane Surge, your next Shimmer will cause a Blast Wave at your previous location, dealing (54.3% of Spell Power) Fire damage, knocking enemies back 8 yds, and slowing them by 70% for 6 sec.

Connected below

Rondurmancy leads on to Memory of Al'ar.

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  Memory of Al'ar

  When your Arcane Phoenix expires it empowers you, granting Arcane Soul for 4.1 sec. : Arcane Barrage grants Clearcasting and generates 4 Arcane Charges. Each cast of Arcane Barrage grants 5 stacks of Arcane Salvo and casting Arcane Barrage does not consume Arcane Salvo.

Same row

Also on this row: Savor the Moment or Sunfury Execution, Ashes of Inspiration and Spellfire Salvo.

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  Savor the Moment
• 
  Sunfury Execution

  Pyroclasm's damage bonus is increased by 20% and Meteor grants Pyroclasm if talented.

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  Ashes of Inspiration

  Each time your Phoenix casts a spell, gain 1 stack of Mana Cascade. Exceptional spells grant 1 additional stacks.

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  Spellfire Salvo

  Arcane Salvo can stack 5 additional times. Meteorite damage increased by 15%.