cred(lore below): Undertale for the game, for the sprite original is by TheTrueColeye, but very edited (This au is mine, P.S.) lore: In Undertale, a player did many genocides, like most au's. Gastor noticed, again, a cliché, but this time, he learned that the echo flowers remember genocides, and used them to warn Sans. He tricked Sans into bringing everyone, all monsters, and the human souls, to the true lab, and used the DT extractor to kill all monsters, including Sans, by absorbing their determination. As they faded to dust, Gastor used the echo flower to keep Sans' body stable and to control him. kind of like Flowey possession sans. echo flower echoes attacks too now.
attacks and stuff: Can echo all monster attacks and abilities, such as Asreil attacking the HP bar, sans KR, Papyruses' control over damage, etc. Also has all attack patterns and can merge. Like Flowey missiles in the Bone Zone or something, making him very annoying to fight. Uses a mini DT extractor instead of Gaster Blaster, mostly the same, but lowers max hp by 1, along with normal damage and all.can echo resets.turns you into all soul types, including orange and cyan. cyan (light blue) has 3 different types: the first is just normal at half speed, and a dash with a cool down. Second is the lazy mode, which moves everything other than the soul, including the box, options like fight, and even attacks. Remember, some attacks are invisible outside of the box. Third is like green soul, but 2 things: one, the thing to block attacks is not always there, click the arrow keys for it to appear, if you hold the button, you can't attack like that.