How about an orb to reduce the cost of upgrades. Once you hit auto upgrade of 400 or 500+, prices are getting a bit high .
Suggestion:
1 star: 1%
2 star: 3%
3 star: 7%
4 star: 15%
Ofcoarse cap it at 20% for example.
Suggestion:
1 star: 1%
2 star: 3%
3 star: 7%
4 star: 15%
Ofcoarse cap it at 20% for example.