Mage talent · row 7 of Arcane, from level 40 (35 with Talented 5/5) · Arcane

Arcane Power

Instant3 min cooldown

For the next 15 sec, your spells deal 30% more damage while costing 30% more mana to cast.

Game files · build 1.60.1.70291Read straight from the WoW Forever beta client.

Compared with Classic

Classic tooltip

When activated, your spells deal 30% more damage while costing 30% more mana to cast. This effect lasts 15 sec.

What Blizzard said about Arcane Power, each line checked against the files.

Matches the files
Arcane Power: Now has Presence of Mind as a pre-requisite.
The files Arcane Power (12042) requires Presence of Mind in 70291; Classic required Arcane Instability (talent prerequisite).
Arcane Power Presence of Mind Class deep dives: Mage and Shaman

69876 Sep 16First beta build we archived. No changes in the client files since.