It is too unreliable to have as your sole combo yet doesn't really work well with the other combo cards that also want fat creatures in the list
It has the potential to see play in land-ramp decks without any other energy support, although there are probably better effects to cheat out permanents in green
I'd argue that Y'shtola falls in the "too strong" category and not a fan of how power-creepy it is, but it's hard to deny that this will excite a lot of players who like obviously powerful commanders
Lets take a look at all of the cards in the Jump to Lightspeed set
Over the years, Magic has invented a multitude of mechanics to build decks around, each with its own unique advantages, dedicated support cards and memorable payoffs
You need blink and mill, and if you have enough of a setup to get value off this there are much better things you can do than big Orc