Owen Bertram was naturally unaware of the plots among his subordinates. He took that Demonic Treasure Coin and deposited it in the Jade Pot before wrapping it with the black oil.
He was a bit worried before, whether the Demonic Treasure Coin hidden in the black oil would catch the attention of the Chaotic Demon - after all, it was a Tire-7 entity.
But he ended up overthinking; hundreds of life memories of Grandmasters fused together, thick enough to conceal everything. As the Demonic Treasure Coin was hidden within, there was no way of detecting it.
However, after a moment of thought, Owen cut the black oil in half with his fingers, divided it into two Jade Pots, and handed the one containing the Demonic Treasure Coin to the Mesmerizing Demon. "Let's give him half first, and the rest after your soul is completely replenished. That way, it won't get suspicious."