Bhorj, Demigod of Depression

You may choose to not untap Bhorj, Demigod of Depression during you untap phase. If you don't, put a -1/-1 counter on a tapped creature an opponent controls.
{t}: Tap target creature and it cannot untap while Bhorj, Demigod of Depression is tapped.
Partner (You can have two commanders if both have partner.)