After searching for a while, Feng Yun finally found a formation.
[Heavenly Thunder Array Map (Weakened Version): This is a weakened version of Heavenly Thunder Array, using the power of thunder to defend and attack. Price: 10 Million Top Grade Spirit Stone]
Feng Yun chose this formation because it was strong, and he could set it up himself. Although the materials required to set up this formation were not available in this world, he had a system to buy from.
Heavenly Thunder Array required a huge source of thunder, as long as there was enough thunder source present, it was unbreakable. The advanced version of this formation used the Heavenly Thunder directly to attack. Naturally, attracting heavenly thunder was out of his reach.
[Thunder Pearl: Contains a huge amount of thunder energy. If it exploded, it could kill Martial Saint Realm cultivation instantly. Price: 1 million Top Grade Spirit Stones.]
