Mage · Arcane · tier 6 · from level 35
Arcane Instability
+51.5 Blizzard
3/3 · level 60 · per cast · and 13 more
Arcane Instability
Rank 3/3
Increases the damage done by your spells by 3% and your critical strike chance by 3%.
Averages, counting crits and misses, for a level 60 Mage with a typical weapon and no other gear or buffs, against a target your level. Worked out from the game's own data, the same way as the Foresight addon.