Other new mechanics specific to this set, Tiered spells and Job Select, are also fun and well represent Final Fantasy, but from a Magic perspective, they are similar to previous existing mechanics
Heres an early proposed list: Creatures (25) 4 Psychatog 2 Putrid Imp 4 Mesmeric Fiend 4 Ichorid 2 Dark Confidant 2 Dimir Infiltrator 3 Golgari Grave-Troll 1 Golgari Thug 3 Stinkweed Imp Lands (20) Spells (15) Remember, this was before people thought about Dredge as being a mechanic that lets you skip your draw steps in order to rebuy cards youre not going to play
WotC suggests that big creatures that are hard to interact with are positive additions to their environments. They might have been thinking of the Avabruck Caretaker / Hollowhenge Huntmaster when they said that, but Im not sure anyone would agree in the case of that card
Sapphire was also notably missing another solid four-drop alternative to Belle, Strange But Special, and this fills the void nicely
7 Chitterspitter A Perfect Fitter Modern Horizons 2 had a dedicated Squirrel theme for its Limited environment
For starters, the price of Sunderflock is predominantly tied to the Izzet Elementals deck, so if it falters, its price may crash