Living weapon means that Kaldra Compleat will spawn a 0/0 Black Phyrexian Germ token on play and equip itself to that token and because of haste, that token will be ready to fight as soon as Compleat hits the board
If not that, there's also a ton of artifact decks, Pirate decks, and Wizard decks
It's time to shape your Magic story
Enchanted Realms is not really a "competitive" deck, but more of an experiment in deckbuilding and pushing the boundaries of EDH
Although its slated as a temporary format on the platform, I wouldnt be surprised if it continues in some capacity if demand is strong
In the beginning try to utilize cards like Leyline Prowler and Deathsprout to deal with attackers, and when the board is finally clear you can play your big creatures in the late game