Wand of Equilibrium
Common Mage Accessory, 4 gold. Backpack Battles item.
Every 3.3 seconds: Gain Mana or Luck or Regeneration, depending on what you have the least of. If you have at least 10 Mana, 10 Luck, or Regeneration: Use 1Mana/Luck/Regeneration (whatever you have the most of) to gain 1 Empower.