[2019] Request: Make fire spirit stackable

I can't think of a reason why they aren't stackable. On person I get, but why not in the bank? All I can think is that maybe their rewards are already predeclared so they need to be separate items. I feel like they should behave more like geodes. Stackable. Rewards are worked out when they're opened.

EDIT: Just thought i'd add that overall I think the update was great. Just something small i'd personally like to see tweaked.