You see stories of cards being flipped for five or even six digits online with alarming regularity, causing the COVID-19 pandemic's equivalent of a gold rush
Almost everything is identical: it costs the same, does the same things, and is as completely busted as The Soul Stone is
These Tera ex with different typings evoke the old Delta Species cards that gave us things like a Water-type and Fire-type Mew, an Electric-type and Dark-type Charizard, and so on
Save them for red decks designed to ramp up to large amounts of mana, and use them to remove creatures if you must
I made it because Im obsessed with the Yuna, Hope of Spira, card
Plus, late game, if you have the mana, you can morph, flip down, morph and potentially get two or three copies of something