Personal Info:
Real Name: Worldkiller-1
Also Known As: No known Alias
Place Of Birth: Krypton
First Appearance: Supergirl Vol.6 #29 (2014) Modern Age Villain
Known Associates: Reign, Deimax, Perrilus, Flower of Heaven
Group Affiliation: Worldkillers, formerly Diasporans
Base Of Operations: Mobile
Grudges: Supergirl
Creators: Tony Bedard and Yildiray Cinar
Enhanced Abilities: Worldkiller-1 has super human strength, agility, speed, endurance and durability.
Possession: Worldkiller-1 is able to take physical and mental control over another living being. Worldkiller-1 has a symbiotic relationship with the being he possesses, resulting in each being dependent upon the other for functionality.
Flight: Worldkiller-1 is able to fly and is even capable of interstellar travel.
Self-Sustenance: Worldkiller-1 is able to survive harsh environments without air, sleep, food or water. He is also able to survive unaided within the vacuum of space.
Worldkiller-1 was the first of the Worldkillers, biological weapons created in Krypton by Zor-El (a fact which he would eventually deeply regret). Although the remainder Worldkillers were genetically altered alien specimens created to conquer, Worldkiller-1 was a symbiotic parasite and was created to "empower".[3] He believed that a race would become stronger if they were faced with the loss of their home planet, and his mission was to cull the "weak".
The five Worldkillers survived the destruction of Krypton, but Worldkiller-1 left the group at some point. Eventually he came upon the Diasporan race, and possessed their ruler. Posing as the Diasporan King, Worldkiller-1 sent the Diasporan army out to reinforce alien species by slaying whoever was too weak to fight them off.
Worldkiller-1 at DC Database
Worldkiller-1 at Comic Vine