Assault the target's mind with Shadow energy, causing X Shadow damage over 3 sec and slowing their movement speed by 50%.
Mind Flay is a priest ability learned at level 10 for those with the Shadow specialization. It is the spell with the best damage/mana ratio for the priest, and it has the additional bonus to slow runners by 50%
Use: Permanently teaches you this glyph. Your Mind Flay spell no longer slows your victim's movement speed. Instead, each time Mind Flay deals damage you will be granted 15% increased movement speed for 5 sec, stacking up to 3 times.
Patch 4.2.0 (28-Jun-2011): When interrupted while casting a single-school spell such as Mind Flay or Frostbolt, players will now be able to cast dual-school spells such as Mind Spike (Frost and Shadow schools) or Frostfire Bolt (Frost and Fire schools). However, being interrupted while casting a dual-school spell will still interrupt all respective schools as intended.; Mind Flay damage done has been increased by 12%.
Patch 4.1.0 (26-Apr-2011): Mind Flay should no longer lose a tick of damage when the last tick is clipped by another Mind Flay cast.
Patch 3.3.0 (08-Dec-2009): Mind Flay: The range of this ability has been increased to 30 yards, up from 20.; Mind Flay: The rank 1 tooltip has been corrected to indicate the accurate damage and snare effect. In addition, this ability will now work correctly with [target=focus] and [target=mouseover] macros.
Patch 3.0.8 (2009-01-20): Fixed a bug with targeting where you would not deal damage if not facing the target while channeling. Also corrected an issue where the damage from this ability was slightly delayed.
/Patch 3.0.2 (14-Oct-2008): Can now periodically critically hit. The spell coefficient has been increased approximately 30%.
Patch 1.6.0 (12-Jul-2005): Will now cause damage to targets immune to movement slowing effects.
Patch 1.4.0 (2005-05-05): Should now be affected by the Focused Casting talent.