Its dimensions are the same width x height measurement of a typical card, but the thickness is more like 3 to 4 times the normal mtg card size
Next, lets talk about the mini dice (which can be used as damage counters)
Golgari (black/green) and Dimir (black/blue) builds playing Sheoldred already exist, and one of these color pairs might just emerge at the top of the new metagame
Gix Tempo Gix, Yawgmoth Praetor is essentially Mono Black Edric, Spymaster of Trest that has a slightly weaker card draw engine (you have to pay life) and weaker colors but instead comes with a built-in finisher, trading your individually weaker cards of 1/1 evasive creatures for actual haymakers and win conditions of your opponents' libraries
I've found a usable source for the Unfinity symbol, but haven't vectorized it yet
So, stuff like Ancestral Recall won't be here