Summon King: My Hero Synthesis System

Once the social animal traveled through time, he actually became Edward, the famous "prefect who repeated his grade" in a different world college. In this world where demons are rampant, he who barely awakened his summoner talent at the age of eighteen was supposed to have no future, but accidentally activated the mysterious golden finger - five heroes of the same level can be combined into a higher level! From then on, ordinary people become elites, and elites become extraordinary. Let's see how Edward, who has complained about max level, develops carefully (yin) and (human), hoards heroes, synthesizes and advances, and takes a different counterattack path on the road of summoner! "Set a small goal first, starting from synthesizing the first elite hero?"