Brynden, Lord Bloodraven

Whenever one or more creatures you control deal combat damage to a player, investigate.
{2}, {t}: Investigate, then target creature gets
+1/+1 until end of turn for each clue you control.
{2}, {t}: Tap target creature, it doesn't untap
during its controller's next untap step. Investigate.
"How many eyes does Lord Bloodraven have?" the
riddle ran. "A thousand eyes, and one."