Glimmervoid
The Glimmervoid on Mirrodin is an expanse of smooth, tiled metal that is otherwise featureless. It is in the same general location as the Razor Fields, or between the Razor Fields and the Oxidda Chain and the Tangle. The reflective metal surface can be used to send spells in several directions at once.
Durnig the Phyrexian takeover the Glimmervoid became a Contested War Zone.