Legendary Creature - Shaman Cat Topiary Stomper Vigilance (Attacking doesn't cause this creature to tap.) When this creature enters, search your library for a basic land card, put it onto the battlefield tapped, then shuffle
While only representing 8.2% of the submitted decks, it comprised 75% of the decks in the Top 8
If you want to exploit landfall, a few choice landfall cards like Greensleeves, Maro-Sorcerer, Scute Swarm, and Springheart Nantuko let you take over the game while utilizing cards like Uro, Titan of Nature's Wrath and Risen Reef to make all those extra land drops
The level of knowledge about each monster is totally different too
(Exile all creatures from your library for infinite turns + any other instants or sorceries you want to recur and a stacked deck.) Tidespout Tyrant + cheap artifacts / mana rocks = infinite mana/storm, e.g