Metamagic Wandgrip

This cylindrical copper item is unadorned except for a single magical rune carved out of the handgrip, so that the wielder's skin is exposed to the magic item through that rune.

You can apply any one metamagic feat you know to a wand placed within the metamagic wandgrip. Doing this drains an additional number of charges from the item equal to the normal cost of that feat in spell slots. For instance, Extend Spell normally raises the cost of a spell by one level, so using Extend Spell on a wand would drain one additional charge (on top of the cost of the spell being cast) from the item. In all other ways, this item functions as if you had the Metamagic Spell Trigger feat.

Activating a metamagic wandgrip is subsumed in the activation of the wand. It functions only three times per day. Placing a wand into the wandgrip (or removing a wand from it) requires a move action.

The hollow rune glows whenever the item is used, though its position inside the closed hand makes this difficult to see (Spot DC 15).

Prerequisites: Craft Wondrous Item, Metamagic Spell Trigger.

Cost to Create: 3,000 gp, 240 XP, 6 days.

Source: Complete Mage, page 133. Removed “or staff” from one sentence of the descriptive text, since the item supposedly only fits wands.