rough shale
You will gain access to the Talent Tree, when you gain access to Space. There you have an chance to fullfill your talents with upgrades,
it could cost items, tokens, money or what ever.
This Talent Tree would help u upgrading your "Sell multiplier, Movement Speed, Shop expandable at (Warp mike), Make shop more affordable, gemmultiplier, xp-multiplier, token-multiplier, better chances when opening keys.
But this talent tree shouldnt be easy to fullfill and get every upgrade. This should be something u should grind for days for, not just a few hours.
Therefor i would suggest the purchases of the different talent-trees upgrades would cost stuff there takes time to farm for.
Example, 1x T4 "Wheat block" or what ever.
Thanks for reading my suggestion.
gilded depot
solar granite