Overchannel Item [General]
You are able to squeeze greater immediate power out of charged magic items at the expense of burning more charges.
Prerequisite: Any two metamagic feats
Benefit: You may apply the effects of any metamagic feats you know to a spell cast from a magic item with charges, such as a wand or staff. Doing so burns an extra charge from the item for every spell level the metamagic feat normally adds to a casting. For example, when using a wand of fireball, the user could cast a maximized fireball by using four of the item’s charges instead of one.