When I first saw the card, I said "Wow! That would definitely come in handy!" I normally play a stall-based time deck, so there are a lot of turns where I don't play something, and if I had this card out, turns where I might voluntarily not play something. But then I started thinking, "What would I actually take out of my deck to make room for this?" I could make room. It would be a cool card for me, but I think most decks, which focus on TTW, moving fast, and damage per quanta, would find the card entirely too slow when they can drop out a bunch of other alternative creatures for less quanta, and not have to slow down their game to let this one grow.
It gets major points for uniqueness, all the same. It's just getting mixed reviews because you'd have to deliberately make a deck where this card could work, versus sticking it in an existing deck.