Catch-Up Mechanic is a common Creature — Human Artificer card from Unknown Event (UNK), collector number CW05.
When this creature enters, choose one. If an opponent has at least 5 more life than you, choose any number instead— • Put two +1/+1 counters on another target creature or Vehicle. • Return target artifact card from your graveyard to your hand. • Look at the top five cards of your library. Reveal an artifact card from among them and put it into your hand. Put the rest on the bottom in a random order.