He had the idea to try fusing things with Supreme Metacs, and since he had nothing to lose, he decided to go for it.
So he didn't remove the Apostle Enslavement Supreme. Instead, he used the spark of power to fuse the Root of Power with it.
The fusion produced the Apostle Enslavement Supreme Metac. The only difference between this Apostle Enslavement Supreme Metac and the earlier one was that it now contained a Root of Power Metac inside it.
Chuckling, he said, "I don't know what I expected to achieve with this."
Actually, he did know what he expected. And not getting what he wanted now wasn't enough to discourage him. Coincidentally, the Freedom Supreme Metac had just finished its work, giving him the opportunity he needed to test his hypothesis.
