Here are a few related posts from The Book of Cards by Dreamweaver thread:
You can use it to grow and charge any item you own, even items without fields, it will grow the inherent field that makes the item what it is.
Items with fields can also be grown on it, once started, it will continue strengthening/growing it for for one hour.
Be careful with how much you boost/grow and item, because it can become un- use-able.
The word to activate it is “charge” or “begin charging”.
you know, my intuition is telling me this is one of those things @Dreamweaver hasn’t told us the full story on how to use this properly.
And it’s not for “boosting” fields per se.@Atreides had the right thinking tho with the making something more something…
hmm…
there is a lot more fun in figuring it out by direct experience.