Yoshiro the Slumbering Ronin

Yoshiro doesn't untap during its controller's
untap step.
When a creature becomes tapped, it doesn't
untap during its controller's next untap step.
At the beginning of each player's upkeep, if
that player controls three or more tapped
creatures, untap Yoshiro. That player may have
Yoshiro deal 3 damage to them. If they don't,
you gain 3 life and draw a card.