Surge of Light You have a 15% chance when you Smite, Heal, Flash Heal, Binding Heal or Greater Heal to cause your next Flash Heal to be instant cast and have no mana cost. Limit 2 charges.
Surge of Darkness Periodic damage from your Vampiric Touch has a 15% chance to cause your next Mind Spike to not consume your damage-over-time effects, become instant cast, cost no mana, and deal 50% additional damage. Limit 2 charges.
Your next Mind Spike will not consume your damage-over-time effects, is instant cast, costs no mana, and deals 50% additional damage.
Duration: 10 seconds
From Darkness, Comes Light (Passive)
Passive
Surge of Light You have a 15% chance when you Smite, Heal, Flash Heal, Binding Heal or Greater Heal to cause your next Flash Heal to be instant cast and have no mana cost. Limit 2 charges.
Surge of Darkness Periodic damage from your Vampiric Touch has a 15% chance to cause your next Mind Spike to not consume your damage-over-time effects, become instant cast, cost no mana, and deal 50% additional damage. Limit 2 charges.
From Darkness, Comes Light is a passive priest talent available at level 45.
Patch 5.0.4 (28 August 2012): Added. 
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