At the beginning of the end step, if you control no artifacts, sacrifice this land.
: Add one mana of any color.
An empty canvas holds infinite possibilities.
Illustrated by Lars Grant-West · Mirrodin · #281
There are no rulings for Glimmervoid.
At the beginning of the end step, if you control no creatures, sacrifice this land.
: Add one mana of any color. An opponent gains control of this land at the beginning of the next end step.
This land enters tapped.
When this land enters, sacrifice it unless you tap an untapped artifact or land you control.
, Sacrifice this artifact: Add one mana of any color.
: Add .
, Sacrifice this land: Add one mana of any color.