Just playing this as a vanilla creature is a lot less appealing, but it isnt a bad fail case I like this a lot because it resembles some of the Adventures from last Eldraine that were huge overperformers
While it certainly has its advantages, I found that after a dozen or so matches with the deck I never once won with Thassa
Teferi, Master of Time I typically avoid planeswalker ults on lists like this because achieving them is incredibly inconsistent, but Teferi, Master of Times static ability makes it much more reliable than most and all the card filtering helps sculpt the perfect hand for those two extra turns
The remaining two abilities grant you a larger token for each time you level it up
Mishras Factory and Strip Mine from Antiquities and Oasis from Arabian Nights
Haliya, Guided by Light is a common inclusion in Ragost, Deft Gastronaught decks