I found it to be the way that I most enjoyed playing
I know its pretty obvious, and its in the title
Thassa's Oracle has come to prominence as an alternate win condition in self-mill decks
Id be more inclined to play Regna, the Redeemer as a creature in a lifegain deck that also wants creatures, like with Soul Warden-type cards
(2) Auras can't be attached to that player
And while 90s creatures generally suck they get a whole lot stronger if we dont have to pay their absurd mana costs: I went with Crater Hellion and Thunder Dragon as mini board wipes, Multani, Maro-Sorcerer and Verdant Force as beefy dorks, but my favorite is Zodiac Dragon, a Dragon that doesnt even fly but has a big body and returns itself to hand each time it dies, which means you can do stupid stuff like cheat it out with Sneak Attack for one mana, then sacrifice it to Greater Good to draw 8 cards, return it to hand and repeat as much as you want