You can ramp in the early game or get 5/5 stats in the late game. Really nice, solid card. Unlike Wild Growth or Darnassus Aspirant, you are completely happy to draw this late. It is stretching it for a ramp card at 4 mana though.
It´s like a [cardDarnassus Aspirant[/card] that doesnt cause you to lose tempo on turn 4, or a Wild Growth that gains you a 3/3 Minion. I´d go as far as to say that it will replace one in the deckslot or even BOTH because it is SO flexible. So flexible in fact that you will get to choose one of THREE abilities. (Also, you cannot LOSE a manacrystal if the swamper keeper is killed.)
Wait, THREE?? But there´s only two options there! Well, as it turns out, the gain a mana crystal is the exact same wording as on Wild Growth. And Wild Growth actually gives you a mana crystal, and so will this (or so I strongly assume). And drawing cards is always nice if you try to dig towards a Swipe or similar cards or a big threat.
The Slime option seems to be viable as well if you want some extra tempo on turn 4.
Overall, great card! I expect it to see a lot of play!
I don't see this as an auto-include card, and it certainly won't replace Keeper of the Grove (that Silence effect is too valuable). If I were to use this in my own Druid deck, I'd most often choose the Ooze, as putting two bodies on the board with one card, even small ones, is an effective way to regain or maintain board control. At 4 mana, adding an extra mana crystal is only effective if you're already ahead on the board. And there is no card draw with this guy, so Ancient of Lore (and/or Azure Drake) will still have a home in most Druid decks.
When it comes to ramping, grove tender could be considered better since you gain a full mana crystal so on turn 4 you could play GT and a 2 cost card (like wild growth) on turn 4. Well grove tendor is GvG card so moot point.
I personally think it trades too well, would have preferred the ooze to be a 1/2. Just having an extra body on the board that doesn't die to recruit or ping seems good enough. So either yeti stats or 3/3 plus ramp. Maybe I'm just overestimating the value of having a choice tho. Cards that are flexible seem really strong in Hearthstone.
Thought for sure we were going to see the first druid legendary, like corrupted Cenarius or something....Thanks Blizzard for dissapointing us with more trash......
Trash? Seriously? What were you expecting? Vanilla 7/7 for 3 mana? This is a really good card. Maybe it doesn't fit every druid deck but it's incredible in ramp in the very least. Someone always has to whine...