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We had gathered after the entire battle was over. There were not many spoils of war because the Shadow Beast didn't dropped a thing, which really disappointed me, but there were the corpses of the other Snakes, which each one gave a Rank 4 Mana Core, there were six snakes, one of them was tamed by me, Kuro, while the other five were slain, so I got five Rank 4 Mana Cores of darkness and shadows out of that.
Alongside this, there were approximately 12 members of the Dark Shadow Sect, some were just Rank 2 Peak Stage while others Rank 3 Peak Stage, so the Mana Cores there were rather varied.
Check "The Protagnist's Sister Is Actually the Strongest"!