Complex sentence: The true Adam alive again decides to take Thanos's advise to go back to "the existence that is his" and immediately goes to Pip the Troll who runs to his friend with open arms and they return to their old life of adventure.
Split into simpler sentences: The true Adam, alive again, decides to take Thanos's advice to go back to "the existence that is his". He immediately goes to Pip the Troll, who runs to his friend with open arms, and they return to their old life of adventure.