Watch Over
Put your hand over your eye to watch over others.
You know that way cartoon characters and pirates watch out below them, with their hand shading their eye? That! Now imagine doing that right now.
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As you watch over your friends and neighbors you see movement in the distance. Oh no, it's Genghis Khan (かん) and his army!
Welp, nothing much watching over them will do now. Genghis Khan is probably going to take over your town, so I guess you can watch if you want but... I wouldn't.