Ulalek also has a ridiculous ability in terms of complexity and power level
This halfling will draw you a card and gain you 1 life every time that your opponents do this, regardless of whether theyre casting a Cultivate, cracking a Misty Rainforest, or casting a Demonic Tutor
Contents: 12 Magic: The Gathering Foundations Collector Boosters
You see, as it enters you can choose Artifact, Enchantment, Instant, Sorcery, or Planeswalker, and then nobody can cast those spells
Its proven to be a damn good combination with bounce lands and cards like Amulet of Vigor, allowing you to start a sequence where you bounce a land, generate 2 mana, return another land to your hand, play it, tap to generate mana, play another land, generate 1 more mana, and so on