I think a mining battle tool might work better for dust (im thinking some sort of mallet/hammer) but an infuser would be cool for marble
"Choose one of your stones on the board and turn it into dust in its space" has the potential to create overpowered effects with negative numbers. (e.g. play 73, play -134, crush -134 into dust, play 67 twice, play -134 on the dusted space, repeat)
Yeah, negative dust is funny like that. Usually a detriment, unless you're using negative stones yourself, in which case it's very powerful.
