Liquimetal Pearl

You may choose not to untap Liquimetal Pearl during your untap step.

At the beginning of your upkeep, if Liquimetal Pearl is tapped, it deals 3 damage to you.

{2}, {t}: Target permanent becomes an artifact in addition to its other types. (This effect lasts indefinitely.)
{3}, {t}: Gain control of target artifact for
as long as Liquimetal Pearl remains tapped.