The Ethereal Portal is basically a much more visually impressive version of the standard hearthstone. It shares the same 30 minute cooldown as the standard hearthstone, which means, no… you don't get an additional hearthstone cooldown with this item. 😉
Have a look at the hi-def video posted below, paying particular attention to what happens at :34 and again at 4:17…
It seems Dotmaster has found a way to render a mega-size Ethereal Portal, by activating it while mounted on their Traveler's Tundra Mammoth. This effect is likely a bug and may be addressed, but it makes for a pretty awesome graphic nonetheless.
The Ethereal Portal is one of the more unusual and exciting on-use loot items in the game.
Portal Stone loot cards are selling for around fifty dollars at this time, which is actually a pretty good deal considering the rarity of this card. The Portal Stone loot card is rare, being inserted at a rate of approximately 1 in 121 packs. Icecrown booster boxes sell for about $60-$65 each, and contain 24 packs. At 1 in 121 booster packs, one could expect to root through up to five boxes of Icecrown before producing this loot card. At that rate, this card could end up costing hundreds of dollars.
$50 isn't so bad now, is it..? 😉
Current Portal Stone Loot Card Auctions on ebay
[phpbay]portal stone loot, 3, “150192”, “”[/phpbay]