So you are looking for an array of positive auras to use to give it some pants
Like, honestly guys that is a level of gross I didnt think Wizards would go to
While theres a lot of synergy here, the cards are mostly strong independently, and the deck is designed to play a fair, interactive game that just happens to be able to gain infinite life with Urza and the Thopter Foundry / Sword of the Meek Combo, but mostly Urza, Oko, and Emry are all amazing standalone cards that require fairly different answers
Its got Flash, and it exiles something on the spot
Willowdusk allows you to easily boost up any creature, giving it +1/+1 counters equal to either your life gained or life lost
Ursula's Return takes the famous Little Mermaid villain and places her center stage as the expansion's big bad, and also introduces the extremely hyped Sing Together mechanic, which has a chance to fundamentally change some of the strategies within the game's always evolving meta