The Brought Giants!!!

'They got giants with them,' Gege said before adding, 'real giants, not just five or tens meters tall, but some even reached fifty meters.'

"Giants?!" Arthur exclaimed in shock, "from where did they bring these?"

He turned around as he softly added, "and why are they using such force to crush those here?"

'I… dunno anything about this,' Gege sighed, 'according to the tree that appeared out of thin air after starting to crush mountains.'

"They crushed the mountains without the aid of the giants?" Arthur asked in doubt.

'They use some sort of a fiery ore that has an explosive nature. The moment that ore was touched by fire it would explode.'

'Ding! That's not good,' the system said, 'Ding! You need to awaken them.'