While you could use any energy type to fullfil these requirements, a Double Colorless Energy would provide two energy in a single turn
We've compiled a list of all the different card rarities you'll find in the game
Starter Deck: Yugi Gaia The Fierce Knight #SDY-007 CGC 9.5 on Fanatics Collect home / Buy Now / 2002 Yu-Gi-Oh
We don't want blue-red decks to have access to an extra card in every game of Commander for all time (and it's not like it's a color combination that needs the help!) nor have players who don't have access to Lutri get told they "have to" play Lutri
60 Pokmon card deck Company: Pokemon USA Series: Sun & Moon Item Type: Theme Deck Brand: Pokemon Release Date: January 20, 2017 UPC: 643690331537 Stock #: 143713 Our Guarantees to You, Our Valued Customer
However, attractions are not defined as traditional cards, and dont live outside the game, so they do work within the rules framework we have