They are essentials in Elf decks rather than your typical land-based mana ramping in Green like Rampant Growth or Cultivate
Mayakashi Winter X SPELL Continuous Monsters your opponent controls lose 100 ATK/DEF for each "Mayakashi" monster with a different name in your GY
It also has multiple copies of the critical Swordsoul cards, making it playable immediately
BT9-008 U Digimon Lv.3 Agumon (X Antibody) Color Red Cost 3 DP 2000 Digivolve Cost 1 Red 0 from Lv.2 Form Rookie Attribute Vaccine Type Dinosaur/X Antibody Card Text 1 [Special Digivolution Condition] [Digivolve] 0 from [Agumon] [Effect] [On Play][When Digivolving] Reveal the top 3 cards of your deck
PLUS, Pokmon Cards & other Pokmon Collectibles, Magic: The Gathering Cards, Lorcana Cards, One Piece, Dragon Ball Z, Yu-Gi-Oh
Landcycling: Want a specific land type