Robin King ONE SHOT w Scorpion - Kingdom of Madness H7T5 - Injustice 2 Mobile (Free to play)

I was expecting a challenge, and really didn't think that this would be so easy... And I love God Killer in this build. It helps with your survival, and provides a good damage buff. Boss RK has a damage AOE that slowly creeps to you all the time. His Sp2 erases away all the buffs on you, and all the debuffs on him. When your life reaches too low, you won't be able to hit him. I am a FREE TO PLAY player, so I generally work with whatever is given free.