rare candy card (Celestial Guardians #144/239, 2-Diamonds) The item may be similar but not exactly the same as the image (e.g Rare Candy - 069/078 (PGO)

Sometimes price changes due to sheer popularity like the high price of The Lord of the Rings: Tales of Middle-earth set booster boxes, or like Kaladesh that have inventions see a faster rise in price since they have limited edition elements

The game is primarily for playing and Im sure that there are very few cards printed that have never featured in a deck somewhere in the world

The games mechanics follow the card game exactly

Twelve loyalty is so much, even with all your planeswalkers proliferating, and picking them off to take the extra turns weakens your board since your superfriends deck ostensibly wants those extra turns to activate its planeswalkers again