Archangel's Staff

+250 Mana
+50 Ability Power
+10 Mana Regen per 5 seconds

UNIQUE Passive - Insight: Gain Ability Power equal to 3% of your Maximum Mana.
UNIQUE Passive - Mana Charge: Each time you cast a spell or spend Mana, you gain 5 maximum Mana (3 second cooldown). Bonus caps at +750 Mana.

This item transforms once it reaches +750 Mana, gaining a powerful mana shield active.