SyntheticlTale is an Undertale AU, in this AU Asriel created for himself an Synthetic Soul with his God-Power just before he break the Seal of the Underground, this Soul connected to him, he never turned back into a Flower. (the idea of creating an Synthetic come from Frisk, Frisk give that idea to Asriel just after they finished their fight, Asriel is extremely thankful to Frisk for that idea)
The Soul allow him to be himself once more, plus the Soul give him many other powers...
SyntheticlTale is an Undertale AU, in this AU Asriel created for himself an Synthetic Soul with his God-Power just before he break the Seal of the Underground, this Soul connected to him, he never turned back into a Flower. (the idea of creating an Synthetic come from Frisk, Frisk give that idea to Asriel just after they finished their fight, Asriel is extremely thankful to Frisk for that idea)
The Soul allow him to be himself once more, plus the Soul give him many other powers...