Causing death at every turn, the moon king sits inside his moon, getting ready to cause death on anything in his sights. Sounds a lot like the Death Star from a certain movie. One of which is "Star Wars: A New Hope."
The name A New Hope, as we all know, comes from the ending where the moon king's son sends a bowling (ぼう) ball into that little opening and knocks it out of the sky.
Currently there are no similar looking kanji which exist in the WaniKani learning system