(Also, we have to be careful how much functionality lands have outside of producing mana.) To get the word "room" onto cards and make it something we could mechanically care about, we made Room an enchantment subtype
Tutoring for Gaea's Cradle, Nykthos, Shrine to Nyx, Strip Mine, Urborg, Tomb of Yawgmoth, or even just fixing your colors is powerful, and Ramunap Excavator can take some of the sting out of having to sac a land to fuel his ability
There is a very real cost (as there should be with The One Ring), since at a certain point the burden counters will be taking significant chunks of life from you, but the cards youre drawing along the way should more than offset it
This gives each Season a huge range of possible outcomes