Righteous Bay Soldier

You may choose not to untap Righteous Bay
Soldier during your untap step.
At the end of combat, if Righteous Bay Soldier
blocked or was blocked, tap noth creaturers.
Until Righteous Bay Soldier untaps, any
creature it has tapped cannot untap.
Few rely on an arm lock to win a battle. But
with a build like that, it can be done.