Building a Bastion of Darkness

The strange castle allowed a bridge to materialize out of nothing and then, a strange slime with powerful time magic radiating out of it appeared.

"Is it a slime? Why does it feel like a Time/Space Core?" One of the Champions wondered.

"It's both." The Champion Angelica answered. She took a step forward.

"Both?" Commander frowned as he approached and drew his massive hammer.

"It's a Slime that grew so strong it's an elemental core. I heard that there is an ancient art that allowed cultivators to grow so strong they could create elemental cores that were alive."

"Should we attack it?" Another Champion asked.

"Attack it? It's a Time/Space core! We must capture it!" Commander Tyrs insisted.

"Try if you can, Commander. There is great magic in this castle. The entire space is being controlled by that Slime." Angelica answered.