legendary duelist booster box Yugioh Soulburning Volcano 1st Edition and Skye Zaizen (as Blue Maiden) splash into this upcoming set Yu-Gi-Oh! Legendary Duelists Duels From

Ill probably still play them in only mono- or two-color decks

Individual bending abilities like Waterbend, Earthbend, Firebend, and Airbend can work outside the set, sure but Avatar Aang himself becomes much harder to build around effectively, especially if your goal is flipping him consistently

Trainer cards that have the same name as a legal card but have effect text that's not era-accurate are legal and will be played as they were worded during this era, e.g

Parallel City #159 (Pokemon Japanese Best of XY | Pokemon Cards) prices are based on the historic sales

Chromatic Lantern is a great option to completely fix your mana, and Oblivion Stone is there when you need an emergency button