Barad-dûr, The Dark Tower

{t}: Add {c}.
{1}, {t}: Until end of turn, your opponents and
creatures your opponents control with hexproof can
be the targets of spells and abilities you control as
though they didn’t have hexproof.

"Then at last his gaze was held: wall upon wall,
battlement upon battlement, black tower of adamant,
he saw it: Barad-dûr, Fortress of Sauron. All hope
left him."