Prison Realm Borderless

You may choose not to untap Prison Realm during your untap step. {1}{W},{T}: Untap another target nonland permanent, then it phases out. It can’t phase in for as long as Prison Realm remains tapped. When Prison Realm becomes untapped or leaves the battlefield, that permanent phases in. Activate only as a sorcery.{/fontsize-24}{/fontsize-29}{/fontsize1}{/fontsize-6}