It's only a draw 5 if there are 2 or fewer land cards and you can play every revealed nonland card by the end of your next turn. I think this is comparable to Urban Evolution.
Agreed on the art though.
Minor nitpick, but you can play up to three revealed lands, assuming you haven't made your land drop the turn you play it; you get two that turn, and one on your next turn. Still don't think the card gets there, though.
My gut says that it's worse than Kalonian Hydra, though I do have a soft spot for that card. Red burn has trouble dealing with Hydra the turn it comes down, but can remove this Ooze, leaving only a 2/2 Ooze, but totally worthless against Hydra. The ooze is obviously better if your opponent just blasts it with a kill spell instantly, so it's floor is higher, but the lack of evasion, and substantially smaller growth compared to the Hydra means the ceiling is much lower. Hydra also operates independently, but Ooze wants you to dump mana into it to be at maximum effectiveness; which is fine if you're flooded, but there are definitely going to be times, I feel, where you don't have mana to spare. Also it encourages you to spend mana on your turn, before the EoT trigger, and it's a triple green activation cost, so the whole thing has me somewhat leery.
Card seems interesting, especially for powered cubes where there are plenty of moxen and the like to borrow in the best case, turn off in the worst. Also interferes with sorcery speed untap effects; looking at you, Tezzeret the Seeker.
Minor nitpick, but you can play up to three revealed lands, assuming you haven't made your land drop the turn you play it; you get two that turn, and one on your next turn. Still don't think the card gets there, though.
Card seems interesting, especially for powered cubes where there are plenty of moxen and the like to borrow in the best case, turn off in the worst. Also interferes with sorcery speed untap effects; looking at you, Tezzeret the Seeker.