See, he could have gone about things the smart way, but this was way funnier and made for a better story. It was also 100% in-character for him to do something like that - the guild he was a part of was commonly mocked in-universe for thinking with their swords rather than their brains.

Plus I was able to hold it over his head for years afterwards. I was a cleric and he didn't even wait for me to do the bare minimum preparations that might have let us survive before summoning them.