Can you make something that will keep him out if you need to?

[ Now Steve is planning. He might not be on the best terms with their Loki, but he knows his own world's god at least a bit better than he knows the new one. The possible need to have young Loki and Strange use their magic to contain the newcomer does cross his mind. If it comes down to a fight, Steve wants to know how well everyone stacks up. ]

He won't make a move he knows he'll lose. I don't think he's reckless enough for that. But how strong is his power compared to yours?