Priest of the Forgotten Souls

Flying, flash
Phase 4: {u}{b}, pay 4 life
(When this creature becomes target of a spell or an
ability an opponent controls or if you pay its phase
costs, exile it with 4 phase counters on it. Remove a
phase counter at the beginning of each turn. When
there are no counters left, put it back onto the battlefield.)
When Priest of the Forgotten Souls enters or leaves the battlefield, tap target creature. It doesn't untap
during its controler's next untap step.