- The Magma Blade is a weapon from the Beast Wars Neo portion of the Generation One continuity family.
Beast Wars Neo anime
Beast Wars Neo manga
After being chewed and spitted by Unicron, Magmatron grips the Magma Blade with his teeth, asking Big Convoy receive it as a "parting gift". Magmatron then repents of his wrong-doings, asking Big Convoy give him an honorable "Warrior's death" with his own sword since he is a warrior. Then Big Convoy kills him with the Magma Blade.
Later, Big Convoy returns to the planet Cybertron and uses Magma Blade to destroys Unicron's physical body.
IDW Beast Wars comics