After selecting Rexion's evolution and putting him in Monster Paradise, John took Levi and the other monsters to fight in the wilderness.
Azelis flew around in the sky, acting as a scout to guide John to places filled with monsters.
Before his monsters evolved and ranked up to King-rank, John also wanted to break through to King-rank.
He had reached the peak of Gold in physical stats by eating fruits, but to increase his Soul power, he needed to absorb soul cores of Gold-rank monsters, which he began doing while practicing his Geno Abilities and Soul Techniques.
He also learned a new Soul Technique after searching for a good one related to his Blood and Metal mastery.
At Gold-rank, he could have three Soul Techniques, and since he was going to break through to King-rank soon, he could have one more.
So ultimately, he still had space and didn't remove the Blood Alloy Sculpture.
Naturally, for the gun, he was using the growth-type treasure he got from the Duraian family.
