(Definitely an interesting one)

"Greetings, you wouldn't possibly be from another universe would you?" Dr. Strange asked.

"I am... and I wish... to stay here." Darth Vader said.

"I'm afraid that is not possible because if you don't leave, I do not get to either. This is all my fault, I never should have pushed America this far." Dr. Strange muttered under his breath. "Why did it have to be in a billionaires cave."

Before Dr. Strange could say another word, Darth Vader force choked him straight into his hand and whispered "You... will not... put me... back there."

Dr. Strange clawed for air before creating a portal. This surprised Vader so much that he dropped Strange onto the floor. "What is this?" He questioned

"That would be a portal." Dr. Strange said, inching closer to Darth Vader, "I assumed a dimension that figured out telekinesis would have figured out portals by now. As Darth Vader turned around, Dr. Strange touched him, which made his soul go outside of his body. Dr. Strange carefully explained "this is your soul. I could disintegrate your body if I wanted to. Or I could drown you, so do you want this the easy way or the hard way?"

Darth Vader used the force to bring his body back to him and regain control.

"Impressive, I haven't seen anything like that in, well, never surprisingly."

"I'm sick... of these... games." He said, drawing his lightsaber. The dim light illuminated most of the cave in red.

"Now THAT is a cool weapon, hold on, I think I have something like it." Dr. Strange said, pulling a glowing yellow whip out of nowhere.

The sound of the two weapons clashing and clanking echoed through the nearly empty room. Sparks flew as they raged on, strike after strike

The two fought for several minutes, pushing and pulling, then Darth Vader stumbled over the edge. Dr. Strange used his whip as a makeshift lasso to hold Vader while he created the portal. Darth Vader said "You fought well..." before falling back into his home dimension