That crushing feeling of 'man you fucked up' is just getting even worse as Strange's eyes widen when the candle freezes. That...is not good. He doesn't specifically know just how bad it is and doesn't want to figure out how bad it is. Strange has started to fully accept that this was a huge mistake. The sooner he gets this creature to its home realm, the better.

Almost instantly, Strange starts preparing a counterspell. However, the problem with English magic is that a lot of it is verbal based. So, as Strange starts muttering a counterspell under his breath to melt the ice, there's a precious few seconds where the fae can cast a spell of their own to stop Strange, magic the frozen candle out of the trailer, or stop him in a mundane way. After all, it'll be a bit hard to keep one's concentration if there's a snowball to the face.