At the beginning of your end step, if a face-down creature entered the battlefield under your control this turn, put a +1/+1 counter on Tunnel Tipster. : Add .
"When your perp goes underground, I know where to find 'em."
Tunnel Tipster’s first ability will trigger as long as a face-down creature entered the battlefield under your control this turn, even if that creature has turned face up or left the battlefield since. A creature that enters the battlefield face up and turns face down later in the turn won’t cause Tunnel Tipster’s first ability to trigger.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.