For the next month, Kyle finished his work on redesigning some of his Methods.
The sudden attack of the five assassins had interrupted his work.
During that month, the birds had gotten used to mining.
By now, they had made a hole that was over a kilometer wide and over seven kilometers deep.
At that point, Kyle had to help them fortify the walls of the hole since some cave-ins were starting to happen.
Usually, Kyle would just tell them to make a wider hole, but he couldn't do that.
His personal territory was only so big.
At such a depth, Metal Elementals were no longer rare.
In fact, they were quite abundant.
The birds had probably killed over a hundred of them already, but even they were starting to reach their limits.
When working together, the birds could even take out a Late Metal Elemental, but sometimes, even two Late Metal Elementals were popping up at the same time.
