While discarding a card is cool, the real reason this equipment gets played is all about untapping those lands
2 Wall of Roots, Vine Trellis, Sylvan Caryatid, and Overgrown Battlement History has shown that a 2-drop Wall that accelerates your mana while providing a strong roadblock ends up being something in Standard
#17: Baba Lysaga, Night Witch A couple of activations of Baba Lysaga, Night Witch will win you most games you play
The types of cards present in Base Set are H (holo rare), R (rare), U (uncommon), C (common), E (Basic Energy) and O (other, here denoting Machamp which was not obtainable from booster packs)
Its basically played everywhere, and it shines more or less depending on the metagame
Many MTG players argued that the cards should have been silver-bordered, making them not tournament-legal