Abel took another look at Rib Bone no. 2 and no. 3. The buff did work on them, that's for sure. However, it was nowhere as obvious as the improvement that Rib Bone no. 1 was making.
From what it looked like, the "soul potion" was meant for increasing the EX point of a skeleton. That couldn't all there was to it, though. Rib Bone no. 1 was a clear example. After having both its soul and bones strengthened, it was now on a completely different level to the other skeletons.
"Resurrection of the skeleton" was now level five. So even if it was just Rib Bone no. 1 that was getting buffed, the other two skeletons would also be "passively" strengthened at the same time.
Black Wind also wanted some of the soul potion. As it wiggled its tail and circled around Abel, Abel padded it on the head.
"You're a mount wolf, Black Wind! You're not a dog, for crying out loud!" Abel scolded him but laughed out loud at the same time.