For one, theres no equivalent to MTGs mana used for summoning cards you simply choose one of the three houses that make up your deck each turn, which lets you play as many cards from that faction as you like that round, so youll never spend a turn twiddling your thumbs unable to do anything
For five mana, you get a Green White Enchantment that makes it so that whenever you tap a land for mana you get to add one mana of any kind that land can produce
I really like the artworks of Impmon (and babies), Birdramon, Hououmon, RustTyranomon, MegaloGrowmon, Tailmon, Angewomon, Jyureimon, Milleniumon and Piemon
While the spike in price is also due to scalping (the practice of buying large quantities of popular or limited-edition products at retail price to reduce supply and increase demand), or the number of new people who only want to collect, if the card gets banned as a result of the skewed metagame, that value will likely drop, pissing off more than one dedicated collector