Well, thats because its a Shiny version of Latias, and these special Pokmon types often have a different color scheme, which really makes them stand out
Given the massive card library, players figured out ways to make three DARK monsters a consistent condition, leading to Dark Armed Dragon being the lead boss monster of the deck Tele-DAD. Once the card was easily summoned, it meant that a monster with 2800 ATK capable of obliterating three cards on an opponents field could pop up at any moment
its like a reimagined piece of Pokmon history ready for you to explore
Hidetsugu, Devouring Chaos was a rare card printed in Kamigawa: Neon Dynasty
Unfortunately, its just a pretty low impact green creature to spend 7 mana on in the age of Vaultborn Tyrant and Atraxa, Grand Unifier