If it's a creature card, put it into your hand
The ludicrous excess of a seven-mana ramp spell practically screams Commander, and given how easily you can go infinite by using that mana to flicker, reanimate or recast Beledros, I expect this to quickly join the staples of that format
Beyond that, this cards utterly gorgeous Naoyo Kimura artwork, which shows a Lugia in profile mid-roar, combines with the diamond-esque card frame to produce one of the most visually arresting cards on this entire list which is saying a lot, as the entire collection herein is full of eye-catching artworks, memorable mon, and notable foiling methods
Trainer cards always were on the backburner when it came to being shiny until the Here Comes Team Rocket card from the Team Rocket set, which featured artwork of Jessie, James and Meowth from the TV show
Additionally, the topic overlaps nicely with my general approach to resource allocation in MTG financea strategy I picked up from one of the greatest investors of all time