Bloodhound Knight

If a source an opponent controls dealt damage to
you this turn, you may cast Bloodhound Knight
as if it had flash. It costs {3} less to cast in this way.
{g}{g}: Exile Bloodhound Knight, then return it to
the battlefield under its owner's control.
Bloodhound Knight's owner may activate this
ability even if they do not control it.
More hound than knight, its master's scent is
everything.