Final Synthesis

In this world, everyone is a creator. After reaching adulthood at the age of sixteen, you can have the opportunity to activate the mysterious carvings in your body, open up a synthesis space, and put in different things to synthesize brand new items! Combat-type synthesizer: Can synthesize fighting spirits to improve combat effectiveness... Life-type synthesizer: Can synthesize buildings, food, sculptures... Auxiliary synthesizer:? ? Special type synthesizer:? ? All-round compositor:? ? ... Carrying the civilization of its peak era back to the beginning of this world...