Ezra, Preacher of Tal

You may choose not to untap Ezra, Preacher of
Tal during your untap step.
{t}: For as long as Ezra, Preacher of Tal remains tapped, gain control of target creature of an
opponent's choice that you don't control. When
Ezra, Preacher of Tal leaves the battlefield or
becomes untapped, exile that creature.
"Suffer not a magician to live"-The Book of Tal