As the game has evolved, the rarity system has expanded from the original tiers to 8 official tiers , plus special classifications for promotional and scenario-based cards
Since its vastly easier to obtain English cards in comparison to Japanese ones when outside Japan, the target market for English cards is thus larger because it includes a wider swathe of competitive Pokmon TCG players
I have pulled 4 of them myself (Kyogre, Palkia, Ho-oh and Suicune) and bought Lugia afterwards
The key to make this work will be cards like Kelpie Guide to untap Yue and use it multiple times in a turn
Triggering for both players means it DESTROYS the mirror, and is worth mulliganing for in that match
Still, there is a silver lining - most of the Commander decks for MTG Warhammer 40,000 have been reduced by 26% ahead of release