Nega Viper

History
During the final fight between the PGXD and Null in the Tulanese Black Forest, Fxceless sacrificed his soul in order to create an amount of energy large enough to cause the souls that made up Null to unbind. He was successful, causing Null to dissipate, releasing a large amount of soul energy that Fxceless used to bind his soul to Tabuskus' Obsidian Sword.

Three years later, Tabuskus attempts to reunite Fxceless' body and soul through the Xullian Ritual of Conjunction. However, unbeknownst to Tabuskus, Sarkello's soul, which was part of Null, had managed to retain its individuality through a phenomenon known as Soul Stratification. Sarkello's soul fused with Fxceless' when he used the energy released by Null to bind himself to the sword. While bonded to the sword, Sarkello's soul was able to gain dominance over Fxceless'.

Once the ritual was complete, the fused soul was reunited with Fxceless' body, creating Nega Viper.