Voidslime

Use in conjuction with Upwelling... that three mana will just stay in your mana pool until you need to use it... it's better than counterspell and cancel because it disables things like Phage the Untouchable... can also get rid of Tideholllow Strixes deathtouch... seems pretty awesome to me! Five Stars! Every B/G player should have this!

This card makes cancel look like spell blast did to counterspell.

I want to give it 4 stars because it is basically a blue themed card requiring green mana in the cost, but I think it's good enough to splash green in otherwise all blue decks.

5 Stars! It may be a little more costy then I would like a counter spell to be, (both price and casting cost) but this thing can help against countless situations

Best card in Dissension

Flexibility at its best! One of the most useful cards ever. Four copies are a must in any blue/green deck.

An incredible card to use in a blue/green deck, though due to the specific casting cost it makes it difficult to stick 4 into a deck while other useful counters are much easier to pull out. It is an incredible card for the ability to counter activated abilities, but 3 in a deck would meet my needs any day.

I'm giving it four stars because of how versatile it is. Leaving that three mana unused for several turns can really put you behind in board development. I'm not sure it isn't deserving of five stars but that casting cost is a drawback on a reactive card.