He is Vilgax The Conqueror! And Ma Vreedle's severed head will serve as an example of what happens when you cross him!
An awesome commission of how it fucking should be. Vilgax is the biggest and baddest in the universe! Not some stupid gag mary sue that was clumsily forced into the lore 3 series in.
This awesome, cathartic SFW commission was made for me by the awesome artist Greenskull34