Sho-Gath's Box

When Sho-Gath's Box enters the battlefield, an opponent chooses a number between 1 and 100 randomly.
{1}: Sho-Gath's Box's controller chooses a number between 1 and 100 randomly.
If the chosen numbers match, exile Sho-Gath's
Box and put 5 7/7 brood creature tokens onto the battlefield.