This set features unreleased cards from Sword & Shield, and being the final set from this era, it has a combination of 14 different sources
This is easily done within the confines of the precon, both with the commander that investigates every turn to make a Clue and with various draw spells to trigger all of your permanents
Its got a crazy strong ability called Concealed Cards that lets you discard any energy from your hand to draw two cards
It not only returns a creature for as cheap as 2 mana backed up with a 4/4 lifelinking creature, but it also gives lifelink to the returned creature, making it a game-ending threat against aggressive decks
Pyromancer Ascension and Harness the Storm are spell payoffs that don't really work in EDH, but become actual role-players alongside the instant/sorcery cards on this list, like Dragon's Approach or Slime Against Humanity
Map tokens show a willingness to play with the complexity of tokens, which demonstrates how engrained they've become to how we design Magic cards, although I will admit it's an area we have to be careful with