Rowan needed to harvest all of the Cerulean Galaxy to earn that figure, which was akin to a trillion Soul Points, but this was what he needed in order to grow and leverage his overpowered abilities.
Having made up his mind on the next series of actions, he set his plans in motion.
Rowan began by expanding his Territory, not outwardly, for the Primordial Sea of Darkness had already reached the very edge of his Mental Space, and he only had to make this Sea that was less than six feet deep into a true sea with endless depths.
Using 2,400 Soul Crystals at once would create a massive commotion due to the trillions of gallons of Seawater that would be produced nearly instantaneously.
Not wanting to disturb the peace of the four Angels who were about to reach their peak maturity, Rowan moved the Soul Crystals to the edge of his Territory, and with a single thought, he crushed them all, channeling the Stuff of Creation to produce the Sea of Darkness.