Suspicious Egg

Suspicious Egg enters the battlefield with three time counters on it. At the beginning of your upkeep, remove
a time counter from Suspicious Egg. When the last time counter is removed this way, return Suspicious Egg to
your hand, you may put a creature card from your hand onto the battlefield.

Pay {3}, remove a time counter from Suspicious Egg.

Other creatures have "Whenever this creature attacks, you may have it fight Suspicious Egg".