In the end, we have a five-color deck with decent-but-not-great card quality, a lack of payoffs to go through the work of being five color, and a mana base that leaves a lot to be desired
You dont have that many creature-focused decks in blue, but when you pair this blue enchantment with white or red, you can suddenly draw a bunch of cards
A 3/4 with double strike that becomes hexproof whenever it attacks can also close games quickly - expect to see plenty of The Wandering Rescuer if there are enough small White creatures to build around
Its a Sapphire card, with Sapphire being one of the 6 Lorcana Ink types alongside Amber, Amethyst, Emerald, Ruby and Steel
Having effectively more cards available to play is even better than card draw, which is why Realmwalker is desirable for any creature-type-themed Commander decks with even a splash of green mana