The nirvana divine thunder sword has now successfully advanced to an eighth-rank immortal artifact, and its power has increased several times over before.
If all seventy-two swords are deployed simultaneously, combined with a sword formation, the power unleashed will be even more terrifying, making it Fang Hong's strongest offensive method at present.
It is worth mentioning that after the Nirvana Divine Thunder merged with the Meteorite Divine Thunder, a completely new type of divine thunder was born.
The color of this new divine thunder is still a deep black, but within the black, there is a hint of an eerie purple light.
After Fang Hong's tests, the power of this new divine thunder far surpassed that of the previous Nirvana Divine Thunder and Meteorite Divine Thunder.
Fang Hong simply named it Immortal Extermination Thunder.
In addition to focusing on upgrading the nirvana divine thunder sword, Fang Hong also made full use of the remaining fifty catties of sea heart sand.
