I'd be most inclined to tincture it.
Since it just "came up", and it is not a plant I've seen anywhere in the wilderness around here, I'm duty-bound to pay attention, for so often what we need comes when we need it.
I have stress injuries to my lower spine from 12 years at a very physical job, giving me some nasty night-time pain, especially when the weather's damp. Sure would
be nice if the plant coming up under my kitchen window could help me out with that.