Add Hearth Magic for Prospecting

[eggz]

Please add a hearth magic ability that lets you prospect for a mineral of your choice. Or rework prospecting. Could add a difficulty layer or rustroot quality requirement for certain rare materials or something, or maybe the buff just lasts for a fairly short duration before you have to pay more XP to use it again.

[Fostik]

I mean it's hard to implement, but yeah finding iron ochre and bloodstone on their represented levels might be nearly impossible level hard
Magic pointing you to nearest vein would be invaluable