How come Gladiator didn’t take out Black Dwarf alone and it took Superskrull holding him and Ronan hitting him from behind with a kill shot? Just how powerful was Black Dwarf (obviously Ronan Hammer was more powerful and he is dead).

Thanks for your time. Infinity is awesome. 

Black Dwarf is beaucoup powerful.

Black Dwarf has only one weakness: a peak human black man, with the agility of a panther. That's his kryptonite.