See market price, set, edition, and rarity
Ten colour pairs, ten factions, ten mechanics
But the best ability is the +1/+1 counter transfer to all your other legendary creatures, and that alone justifies putting it in a legendary-matters deck
Watching this community consistently grow and become more diverse tells us that we are getting it just right with Disney fans who are completely charmed by the art and stories, TCG die-hards who appreciate the strategic gameplay, and even new players who have tried their very first TCG and now play every weekend. Into the Inklands will include two preconstructed starter decks, this time represented by Amber/Emerald and Sapphire/Ruby combinations
To my knowledge TCGplayer isn't actually selling any product, they are just listing other stores to sell product and giving buys a single place to buy from