Arcane Potency

Arcane Potency is a Mage talent that increases spell critical strike chance while Clearcasting by 7% per rank, up to 15% at max rank. Clearcasting comes from the talent Arcane Concentration and Presence of Mind is a talented spell in the Arcane tree.

This talent has somewhat peculiar synergy with Arcane Missiles, and a mage who uses Arcane Missiles as part of his rotation can get the +crit benefit twice per Clearcast from this talent; once for a cast of Missiles that procs it, and once again for a second spell that consumes the Clearcast.

Its relationship with Presence of Mind is mainly useful for PvP purposes, as it greatly increases the spell's already large burst potential by making its instant-cast spell a near-guaranteed critical strikes.