Hearthpwn

Damn, this card is crazy. Will rogue finally be viable again now? I'm really excited for this deck. 

Is this the new most insane arena card? Same stats as Pit Fighter and you get 5 potentially ridiculous legendary cards added to your deck? Seems kind of unfair, actually.

N'Zoth has a battlecry effect, so that won't work.

I would have made it a 3/1 with Battlecry and Deathrattle: draw a card. Then it would be a good card and still not overpowered like shredder.

I made a Bloodlust OHKO Shaman deck where you have 7 minions out by the time you choose the second fate, choose windfury (if it's not there you most likely lose) and then win. Most of my opponents seem to only go face which is exactly what I want them to do.

I only just realized that the card's flavor text matches its ability: it can only attack when it's not being seen by anything. 

Great for removing annoying cards like Sorcerer's Apprentice. Mana Wyrm, Snow Chugger, Shielded Minibot, Northshire Cleric, Steamwheedle Sniper, Voidwalker and so on while also helping you gain card advantage. It would probably be best in arena due to the fact that Mages have great spells. The effect only activates when killing a minion and doesn't work on token cards.

Here's my submission:

7 attack, 7 cost, 7 character name.

Edit: Changed name and lowered HP from 7 to 4 to add more balance.

This card has synergy with minions that have a decent body like Boulderfist Ogre. Not only is it able to do 6 damage, but the 7 HP makes it difficult to kill right away. The ideal way to use this card is to trigger its Deathrattle on your own turn. For example, you can trade it with another big minion, like Dr.Boom. This way the Freeze will activate and then expire on the very next turn.

@iSini: Thanks for the feedback. I was tired at the time and didn't realize the amazing synergy it had with cards like Rag and Ancient Watcher, so it most definitely is overpowered. Even using it in a combo with Boulderfist Ogre or other high cost minions seems pretty OP.

As for your card, the first version (a) has a nice effect but seems insanely overpowered. If a Deathwing dies, for example, it would be summoned again without triggering its battlecry. With the Doomsayer, you'd destroy all the minions on the board and pretty much get all yours back (and possibly get back even better ones). Also, I'm curious how this card would function with effects like the one on Blingtron 3000. Is it considered a weapon? If so, any Rogue that manages to get lucky enough to get this could potentially attack with it as well unless you explicitly state that it's an item and not a weapon (though I'm not sure how how you would do this or if it's necessary for this contest).

This is the new version of my card, after a lot of thought:

New effect, probably better than the old one:

Thoughts please, anyone? I've never really played a Shaman so I'm not sure how useful this card is. I thought it would be an interesting effect, but it might be under powered (or overpowered). I was thinking it could be combined with a Death Lord or some other powerful taunt. 

Quote from jazzfan27 jump

Pretty nice cards there.  I like the Kamakazee sheep the best.

 Thanks. I like this card too because the effect only triggers when you attack and not when you deal damage, and I've never seen that type of effect on a card before. Maybe some more cards that have synergy with other sheep could be nice too (to make a sheep-based deck).  

Here are mine:

The spells only work with the 1/1 Sheep. I wanted them to be Neutral (even though Neutral spells don't currently exist) mostly so that people can counter Polymorph. They would also work fine as Mage spells, however.