Tony placed the Darkness Mark over his heart and used the darkness origin to convert it.
Once this half of the Darkness Mark had been fully converted, the new ruler of the Dark Dimension would be born.
As for Dormammu... Tony was very interested in the choice he would make.
Would he spend the rest of his life as a coward, clinging to survival?
Or would he be a badass for one second, then get blasted to pieces?
He turned toward the devil he had just recruited and gave him a friendly smile. "Little Mo, I've got a task for you."
Mephisto shuddered and hastily lowered his head. "Just say the word, my lord! Your humble servant will see it done!"
Tony sent the Shadowkhan's control mark into him.
Mephisto didn't dare move and obediently accepted the mark.
A dense surge of darkness force arose within him, establishing a connection to an incomparably dark world. An endless stream of dark power flowed through the mark.
Mephisto's eyes widened and his heart raced. The corners of his mouth shot upward into an enormous grin. "Thank you, Your Majesty! Long live the Demon King!"
Who said being a dog wasn't fun?! Who said it?!
He gave me such a powerful Darkness Mark after just a few fucking words!
I, Mephisto, am His Majesty Tony's most loyal dog!
"Find somewhere and turn it into the Dark Lands. You'll be rewarded with a Dark Mask. If you do a good job, I'll allow you to retain your own consciousness. If you take too long..."
Tony smiled. "My ancient subordinates are attached to those masks. I'm sure you wouldn't want to anger my ancient dark generals."
Mephisto's expression changed drastically. Being a dog suddenly felt anything but fun!
"Your humble servant will spare no effort