Cutwing Seer

Manaleech (Whenever an opponent activates an ability of a creature, you may pay {u/b}. If you do, draw a card unless that player puts a -1/-1 counter on that creature.)
When Cutwing Seer enters the battlefield, if an opponent controls a creature with a -1/-1 counter, Scry 1.
{3}{u}: Draw a card.