Mage · spell

Frost Nova

73.6per cast

Rank 4 · level 60 · before talents

Frost Nova

145 Mana

Instant25 sec cooldown

Blasts enemies near the caster for 72 to 79 Frost damage and freezes them in place for up to 8 sec. Damage caused may interrupt the effect.

Talents that change it, each at full ranks:
 Arcane Power · with Arcane Power active  +22.1 Shatter · against Frozen targets  +18.1 Piercing Ice  +4.4 Arcane Instability  +3.3 Elemental Precision  +2.3 Ice Shards  +1.1 Arcane Mind  +0.1 Frost Channeling per 100 mana +9.0 Arcane Concentration per 100 mana +5.6 Master of Elements per 100 mana +0.5

All 4 ranks

Rank	Level	Per cast	Per second
Rank 1	10	19.7	13.1
Rank 2	26	33.2	22.1
Rank 3	40	51.7	34.5
Rank 4	54	71.2	47.4

Plan a Mage build

Averages, counting crits and misses, with a typical weapon and no other gear or buffs, against a target your level. Talents at level 60. Worked out from the game's own data, the same way as the Foresight addon.