Thanks for buying my Astral Entity! I am wanting to upgrade him. I think if the cards were not cheap, we wouldnt be upgrading so much, so it is fun to have max level cards and use the abilities, but at the cost of value of cards. I guess we cannot have both and this isnt just unique to Splinterlands. I think only the genesis cards have some sort of protection in Gods Unchained, but still they face power creep in other ways.