Demestia, the Final Harvest

Creatures you control have lifelink
At the beginning of your upkeep, if an opponent has more lands than you, gain 1 life. Then search your library for a basic mountain or plains card, reveal it, put it into your hand, then shuffle your library.
Finale - As long as you have 10 or less life prevent all damage that would be dealt to you and permanents you control.