Spire 2's Weird Invincibility Trick

I've almost never gotten Demon Tongue (because of reasons....), but if you do, you can cheese the game's two hardest bosses. Lovely creators mentioned in video: TheCrimsonBlur - https://www.twitch.tv/thecrimsonblur/ JapaneseExport - https://www.twitch.tv/JapaneseExport (hi other Spire Jason)