Neevil's Amazing Multi-Use Grenade

This small, handheld bomb is made of a number of interlocking pieces, like a three-dimensional jigsaw puzzle. When assembled completely, the specially treated surface makes for a perfect grip. This item was purportedly first created by the legendary goblin inventor Neevil, although he denies any interest or association with the techno-magical combinations. Power: This item is one of several to have cropped up recently that combines goblin mechanical know- how with gnomish magic enhancements. As with many technological items that add magic, the MR is increased by +1 over the basic item type. This particular device acts as a +1 grenade, but applies its bonus only to hit, not to damage. In addition, after it explodes, its pieces pull themselves out of whatever they're embedded in, crawl across the floor, and reassemble into the original grenade. This process takes 3 rounds to complete, after which the device can be recovered and used by whoever picks it up. If any of its parts cannot reach the main body within 10 rounds (perhaps one piece flew over a cliff or landed in a deep lake), the grenade's magic is lost.