Turntimber Symbiosis Turntimber Symbiosis is a solid modal land: early/midgame it's a meh land that enters untapped, later on you cash it in for a creature
Then if you've done all four this turn, transform Avatar Aang
There's never a moment when creatures will have their abilities on the battlefield, so it even beats creatures with powerful enters-the-battlefield abilities
I have not even gotten to the best bit yet which is of course the exile aspect over sacrifice, destroy, bury (if your old school), bouncing or putting back in the library in some way
Its not the most interesting card in the world, but it is a card that I think has a right to exist, and a card that fills a good niche within those niche builds, which is have a win condition that isnt just combat focused