The Essence Soul was still fine. It was directly connected to the main body at the highest level, so there was no need to split his mind and attention to it.
The Blood Doppelganger was different. Although the main body and the Blood Doppelganger could move at the same time, they could not be too focused.
For example, fighting.
Once the main body or the Blood Doppelganger were in battle, the other would need to be temporarily left alone to focus on controlling the one that was in battle.
If both his main body and doppelganger were fighting at the same time, his mental and soul power would be expended very quickly.
But now that he had the Attention Splitting Card, there was no need for that.
After unlocking the Attention Splitting Card, the mysterious power that was directly augmented on Su Jingxing's mind and soul could allow Su Jingxing's main body, doppelganger, and even Essence Soul to fight at the same time without exhausting his mind.