I think you mean only humans from your world can't use magic by themselves, [ Strange butts in, with a little smirk. ] Some of us are quite adept at it.

[ Taking a step backwards, Strange shoos Haunter away with one hand as he starts to mutter something under his breath. A moment later, it straight up starts to rain in the building. The rain's only covering a small area, about the size of a shopping cart and is (thankfully) away from Rita, Strange, Litten, and Haunter. It rains for a good ten seconds before Strange gestures at where it was raining again, and the rain vanishes.

Just ignore the fact that Strange is grinning in a really obnoxious sort of smug manner. He really likes showing off, even if it's only rain. ]