You can only use each effect of "Therion Irregular" once per turn
Almost all cards with 4 or more ink were removed, with a few exceptions: Mulan - Charging Ahead, Cri-Kee - Part of the Team, Mushu - Your Worst Nightmare and the song Beyond the Horizon
As well as preventing your opponent getting repeatable value out of one card, this shuts down a surprising number of one-time-use effects which depend on their card staying on the field
In addition, the use of the blue color palette and the game of using the sky at dusk with the passing of the stars, leaves the card with a forceful weight of attraction and aesthetic construction, not taking away its merit deserved by the illustrator Atsushi Furusawa , who made wonderful art like the promo card for Legends of Arceus with the Arceus V PR-SW SWSH204 and also with the Dragonite V EVS 192 from Evolving Skies, showing how much he has mastery over scenarios and perspective immersion
Iconic FINAL FANTASY characters, minigames, story moments, and more will be represented on these types of cards throughout the set
Non-Japanese Play Boosters and 66.6% of Japanese Play Boosters contain at least 1 non-foil Mystical Archive card
