|Forge World call this the 'Business end'.|
The Fellblade is the first in a range of Astartes pattern super-heavy tanks to be released from Forge World. I saw the prototype of this at Gamesday 2012 and have been awaiting it's release with a great deal of anticipation (they'd sold out by the time I got round to deciding I wanted one). It's a stunning model (about the size of a baneblade according to the stats) and carries some serious firepower!
The dilema is this - buy the Fellblade, or the previously discussed Kit-bashed Thunderhawk? Both will cost roughly the same and will probably be a similar effort to build/paint. Actually, that's not true, the 'hawk will be considerable more effort...but anyways, I shall leave it (partly) up to you. I've set up a poll on the main page where you can cast your vote.
Also if you know of any blogs where people have done a Fellblade let me know in the comments section.