Stockman-Fly created the Antrax as part of his plot to build a mutant insect army that would help him restock the Shredder's money vaults and eliminate Karai. Antrax can reproduce by emitting it's duplicates from it's abdomen. They were defeated by the turtles.

Upper Body: Brock Lesnar Monster Figure
Lower Torso: Movie Abomination
Lower legs mixed Brock Lesnar Monster Figure with Evolve Goliath
Chest armor is sculpted with minor parts on the legs as well
Armor on arms and legs as well as forearms are from McFarland Kiss Figures
Was given Black washes as well as Purple washes to give the skin tone