Zoltar

Zoltar is in the group of Venomari, which allows him to generate poison, along with the others Serpentine in the Venomari tribe.

History
At some point in time, Zoltar became a regular combatant in Mezmo's Slither Pit matches, frequently visiting Yang Tavern in New Ninjago City to fight.

A Team Divided
Witnessing Kai's battle with Big Dan, Zoltar would challenge the Fire Ninja to a battle, with Mezmo announcing the battle extra as being Fire. Following Kai's proclamation of being the Red Shogun, the two would engage in combat.

Trivia

 * Zoltar is the only Serpentine to be mentioned and/or debut in Tournament of Elements, with Arcturus first being mentioned in Rebooted.
 * He is also the only named Serpentine to not make an appearance in the show.