Infinite Mining Tool
Most likely that, or another one, will be offered in the future.
They seem to offer a new version of the unlimited tools every second or 3rd month (sometimes sooner) so just hang in there it wont be too long. And going from what they have given as the last 2 (barrel thing for herbs wasps for hatchet), the mining pick should be the next in order yes.
Since when did this business of being a hero become being a business?