Increases the target's chance to critically hit with spells by 3% for 30 min. When the target critically hits your chance to critically hit with spells is increased by 3% for 10 sec. Cannot be cast on self. Limit 1 target.
Focus Magic is a Mage talent spell obtained by investing points in the Arcane tree. It was introduced in Patch 3.0.2.
It gives a single target at a time 3% increased chance to critically hit with spells only. When the target critically hits with a spell, the buff's caster also gains 3% increased chance to critically hit with spells during 10 seconds.
Notes
The buff-granted effect will stack with the proc-granted effect, so you can have it cast on you and cast it on someone else to gain a total 6% spell critical strike chance. It cannot, however, be self-cast.
It can be casted on friendly NPCs. It is useless, however, because NPCs can't score critical hit with spells.
Patch 5.0.4 (2012-08-28): Removed. 
[Hunger for Blood] should no longer last through a talent switch. 
