Mistake
They say accidentally firing a catapult is an unforgivable mistake. They say you shot the catapult at your own castle. Even though it was an accident, it’s still a mistake you will never be forgiven for.
Imagine shooting the catapult on your own people by mistake. Hear the catapult whoosh as your heart drops into your stomach. Oh, what a terrible mistake you’ve just made.
ご
あやま
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This mistake alerts Godzilla (ご), who thinks it's town destroying time. He barrels over the hills, sees where you mistakenly catapulted your own people, and proceeds to stomp on the rest of it for you.
Picture Godzilla jumping happily on the castle and surrounding town you hit by mistake. This is probably the worst mistake you've ever made.