Advance Wars is now one of Nintendos best franchises
Geralf allows you to trade ground tokens for evasive fliers, which helps break through stalled board states
That includes all the Un sets, Portal and other Starter sets, and stuff like the Global Series, Secret Lairs, and more
I played it for several years after Coldsnap came out as a way to protect my other creatures from dying, and then one day I saw someone use their copy of the Angel to target a creature someone else had that was dying, and then it came back to the battlefield under their controlholy moley, I had such a narrow view on the card
Well, sometimes you want to mill yourself for the same reasons that it is dangerous to mill your opponents
These include Zendikar's Roil, Greensleves, Maro-Sorcerer, Rampaging Baloths, and Springheart Nantuko