Serocca's Imprisonment

Enchant creature
Tap target creature. This creature does not untap during its untap step. If this creature is untapped
or removed from the battlefield, destroy this
creature and target land.
"You sense that Serocca is imprisoned in a cage of
psychic energy. If she ever attempted to pass through,
the resulting release of force would be enough to destroy
both her and the entire city of Thas." - Joe Dever