Based on early prototypes, the set is divided into four rarity tiers: Character Cards (Common) Fan Cards (Uncommon) Retro Cards (Rare) Legendary Cards (Ultra-Rare) While not yet officially confirmed, early prototypes shown in London suggest the cards are standard TCG size
Chocobos, meanwhile, come in a veritable rainbow of colors, including the ultra-rare golden, serialized Chocobo
(It's also not an enchantment they can kill to get their dork back, by the way) But by discarding it for an effect, you net the effect as well as a powerful madness theft of something at instant speed that can change the tables very quickly
Nevertheless, Kuribabylon had the attack points of all the monsters used to summon it, 1500, and could split back into the Kuriboh brothers anytime necessary
If this card in its owner's possession is destroyed by an opponent's card: You can add 1 Beast, Beast-Warrior, Winged Beast, Insect, or Plant monster from your Deck to your hand, except "Kittytail, Mystical Beast of the Forest"
There's a smattering of cards that specifically interact with otters or make otters, and many of them are nice, efficient cards, even for a spellslinger deck with inexplicably few otters: Lilypad Village Valley Floodcaller Harnesser of Storms Otterball Antics Pearl of Wisdom Rockface Village Splash Portal Stormchaser's Talent Valley Flamecaller All of this adds up to an Izzet Prowess deck that features otters, which is awesome