Teferi's Birthday Card

When Teferi's Birthday Card enters the battlefield, choose X—
• Create a colourless Pocket watch artifact token
• Search your library and/or graveyard for an artifact card, reveal it, and put it into your hand,
if you search your library this way, shuffle it.
At the beginning of your upkeep, if you control 1
or less artifacts, create a colourless Pocket watch artifact token