Sea of Lightning
"Wow, that is one terrifying lineup!" Klaus shouted as he stared at the sea of monstrous shapes, all formed from lightning. There were tigers, spiders, zombies, spears, and even some figures made of spears, all standing there, filling the space to the brim.
During his tribulation, Klaus used the black hole to steal the lightning and trap it within the tribulation prison that his senior had created inside his soul sea. He had expected only a few creatures to be pulled in, but he clearly underestimated the black hole's power. The entire 3-kilometer area was packed with monsters.
"I'll need to expand this place before my next tribulation," Klaus said with a satisfied grin. The sight of the lightning monsters and shapes filled him with joy.
"Senior, what's next?" Klaus suddenly asked, his excitement brimming.
"Just kill them and absorb the runes into your body or your Lotus flower," the Senior replied within his soul sea.