Muramana

+1000 Mana
+25 Attack Damage
+25% Base Mana Regen

UNIQUE Passive - Awe: Grants bonus Attack Damage equal to 2% of maximum Mana.
UNIQUE Toggle: Single target spells and attacks (on hit) consume 3% of current Mana to deal bonus physical damage equal to twice the amount of Mana consumed.

(Unique Passives with the same name don't stack.)