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Leonard Churchill had slain his own "shadow," and received a reward that surprised even him given his current level of experience.
Now, he had begun to understand that this "Divine Ruins Treasure House" was likely a mysterious realm created by some ancient major powers to pass on transcendental knowledge to card masters.
Moreover, the reward mechanism was fair to everyone who entered this mysterious realm.
No matter the tier of the card master, as long as you could defeat your own replica, you would receive a reward.
Leonard Churchill also made a point of asking Catherine Carter about the situations of the others.
If someone else helped to kill your shadow, the reward would be much less.
This mysterious realm seemed to encourage card masters to challenge themselves, to find their own weaknesses and improve, while also obtaining fitting rewards.
The higher the difficulty, the more rewards you would get.