So basically except for Elder God Demonbane which gets mentioned in one of the ends but doesn't do anything other than clean Nya's clock, I can provide basically nothing despite having read the first Demonbane VN. Super >_>.
I mean, base Demonbane, yes. I don't know if the Demonbane in the first VN ever reaches planet buster level, but I don't think so.
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"As the size of an explosion increases, the number of social situations it is incapable of solving approaches zero." -Vaarsuvius, Order of the Stick