Arcane Aura can be activated to temporarily provide Crystal Maiden with 35% Spell Amplification, but increasing Mana Costs of her abilities by 50%. While active, any time Crystal Maiden uses her other abilities, allied heroes within 1200 radius receive 25% of the mana spent. Duration: 10s.
The ability duration is paused during the Freezing Field. Can't be cast during the Ultimate with Aghanim's Scepter, but still has full effect