For the love of all that is holy Blizzard, rework this card.

Let’s assume for a moment that a card existed in Hearthstone that read “2 mana: 90% chance win the game, 10% chance do nothing”. I think we’d unanimously agree that such a card would be overpowered. Now imagine a card that said “1% chance win the game, 99% chance do nothing”. We can agree that such a card would suck. That means that somewhere between 1% and 90% we have a balanced card. I think that number is somewhere around 15%. Unstable portal has about an 85% chance to hit a minion that costs 2 or more. 70% for 3 or more. In the event that you play unstable portal on turn two and get a minion costing 6+ (about a 20% chance), you will probably win the game on the spot. All you invested was one card and your second turn to have a boulderfist ogre in play on turn 3.

Will you get Grimscale oracle sometimes? Sure, but even in that scenario all you did was play a 2 mana 1/1. The vast majority of the time you’ll be breaking even or netting a huge tempo swing akin to Innervate or Wild Growth. Is it worse off the top of the deck later in the game? Sure, but still much better than Wild Growth would have been and still capable of rolling a 6 mana Onyxia. Unstable Portal will warp half of the games it’s played in around itself, and the extremely high chance for a free win makes it an auto-include in any mage deck. Hold on to your extra Portals so you can disenchant them for full dust once the nerf bat strikes. However, of all the cards on this list, Unstable Portal is the one I’m least sure about. The variance involved may very well make it unplayable. Only one way to find out, get out there and play!