He can be played as a combo to make 1-damage-away challenges now work, and also sets up some of the Emerald effects that only work on damaged characters
Coliseum Behemoth can destroy enchantments, making it a good way to answer a lot of annoying summons that you might play against
A recent main set spoiler has just caused a 2000% price spike thanks to a new infinite combo
Its an interesting and very powerful ability, so coupling that in-game utility with the stunning card art and textured foil treatment makes it clear to see why this card has immediately become a firm favorite and the front runner, value-wise, of all cards in Azurite Sea
Thematic inclusion aside, Chance Encounter is expensive and doesn't actually do anything useful if it's not literally winning you the game
Scions & Spellcraft is a decent deck out of the box, but between the four Commander decks, it's the one that will need the most upgrades to match the power of other Commander decks