Lucas, The PK User

{u/r}: Untap Lucas, The PK User.
{u}{t}: Tap a creature an opponent controls. It doesn't untap until its controller pays {3}.
{r}{t}: Lucas, The PK User deals 3 damage to any target.
{1}{u}{r}{t}: Tap a creature an opponent controls. It doesn't untap during its controller's next untap step. Lucas, The PK User deals 5 damage to it. If it is still in play, then untap Lucas, The PK User.