C201 Goblin Energy Spread!

After Aulus and the others left, Lee Yuan began to consider whether he should upgrade the barracks immediately.

After charging the Black Shadow Stronghold with 99% of its energy, he still had 380,000 energy stones and more than 11,000 Essence Crystal left.

As for the resources needed to upgrade the rank 7 barracks, he only needed 300,000 energy stones and ten thousand crystals