Unleash Your Powers

—When unleash your powers enters the battlefield tap target creature you control, tap target nonland permanent. They remain tapped for as long
as your creature is tapped. You may pay 1 whenever your creature would be untapped to keep it tapped.
At any time you may pay X where X is the mana
value of the nonland permanent and exile it.
—
"Empire, Halcyon, Protean... even San Fransapporo...
these cities are hubs for people with powers. Nothing like
Haven." - Extract From Cr