"Our defenses? You were there?" Lith asked.
"Of course, I was. That's my turf and the Kingdom spends big money to protect something like a crystal mine. They are more valuable than even platinum. Their production can't be stopped even during winter because magical research would be affected.
"Thanks to their weapons and arrays, the guards managed to hold on until my arrival, but there wasn't much even I could do. You know goblins, right? Well, they were a frigging army, each one capable of using normal magic and those black rays as well.
"Once I realized we had no chance against such an assault, I detonated the arrays to buy us some time and lead the survivors inside the crystal mines. We went to its deepest tunnels and then I used earth magic to bring us even deeper.