Having Food grant life seemed like slam-dunk flavor, and it was a resource that every deck could use
Its a nice effect on the left door, especially if you have a good 1-drop to play, then the more expensive right door is a way to win the game, providing your board manages to dodge a Sunfall
This might hit $2-$3 if it does become an important sideboard card, but thats its top end
Pokemon TCG Pocket Shiny cards, aka Shinies, have been growing in number for several expansions now, with new variants coming out regularly
The execution of this idea was so poorly done that one of the cards, Lutri, the Spellchaser, was banned immediately and another had a companion ability that simply wouldn't function in Commander
The most valuable Pokmon cards normally command high prices because they're old and there are very few copies in circulation