EDIT: made a superior, since a gem pack went on offer... What, it let me properly "research" the cost of a superior rune, this was for science ^^; plus, hopper has poison skin now lol
I've been googling and looking through youtube, and I can only find information from a year or more ago on the topic. So far, I've made lesser, improved, and greater runes, so I know those numbers, and I'm staring at a superior rune, waffling over whether to click craft since I don't have a clue on how many gems it'd take to max it out (and I'd rather not get locked out of my daily crowns until I scrape together the required amount lol). For anyone else hunting around for this information, I'll list what I know:
Lesser: 100 gems to max
Improved: 500 gems to max
Greater: 1200 gems to max
Superior: 1800 gems to max
Elite: 3500 gems (?) to max (based on other forum posts made in april 2018, likely accurate =D )
Hopper will eat literally anything; rocks (stonefist), scrap metal (the furnace), ash (solaris), even bone (a lot of examples lol), AND is a known carrier of disease, and yet she still finds herself suffering from the disease ailment most matches... Something must be done!