Beast had his eyes opened wide as he never expected to tame the lion so easily, it seemed to be exactly like he previously said, Blackie and the lion had a similar bloodline, and Blackie's was the superior one.
Beast had immediately learned everything he needed to learn when it came to the lion. As its name suggests, the lion could truly shallow light, well, not just swallow, it had the ability to absorb light and make itself less visible to enemies. But when swallowing light, one would be able to see a small vortex appear above the lion's mouth, the light would get drawn to him and he would be able to store it in its body. With that light the lion could do many things, one of them being the bright balls of light that exploded upon contact, which was exactly what the lion was doing during its fight against the tiger.
