Summoning a demon in comics often requires a combination of factors. It could involve knowing specific spells, having access to forbidden knowledge, or being in a particular supernatural setting. But remember, it's all fictional!
First, you need to have a deep understanding of the original work's characters and world. Then, come up with an interesting plot that fits within that framework.
Overall, the ending of the manga was well-structured. It tied up loose ends and left fans feeling content. The resolution of conflicts and character developments were handled smoothly.
I recommend "Online Games: My Props Can Be Materialized" to you! The protagonist of the story, Ding Yi, discovered that the items he held in the Spirit Mirror game could be materialized in reality, which meant that he could summon the gods in the game. So this novel meets your needs! I hope you like my recommendation. Muah ~