Wow, that name wasn't taken? Dreadwurm is from the recent set Zendikar Rising and is illustrated here by Lius Lasahido. It's not terrible enough a card that I have an affection for it that way and it isn't reliable enough in Standard to have a place in my tryhard decks so it's nice to give it a spotlight here!
Indestructible has its benefits though! as long as you have a land to play you can safely attack with Novablast Wurm for a cool nigh-unblockable 12 damage a turn.
Dreadwurm isn't just a wurm either, it's a wurm horror, which I can agree with. It fits nicely in my cube where wurm tribal is the green thing and horror tribal is the black thing!
Dreadwurm was also treated to a fancy alternate art version in Zendikar Rising, which sells the horror even better. I would dread that too. This version is by Anato Finnstark, whose art really immersively uses dramatic shadows and light to make some epic images.
I have to say, I was super excited when my very first Zendikar Rising set booster contained both this and Grakmaw (I'm a hydra fan too). I was so satisfied with it I never bought another pack...