We are talking about the Tyranid Hive Tyrant. This is one of the most threatening models in the 40k universe. It is a monster in Melee, shooting and support. The corner stone for many Tyranid lists, this unit can hold your force together by itself.
Lets talk about melee.
The Tyrant has access to almost every upgrade in the codex. A melee tyrant is one of the less expensive builds. It is recommended to load one out with wings, thus making it a flying monstrous creature. The speed of a flying tyrant can be overwhelming for some opponents by itself, but this isn’t its only trick. A lash whip and bonesword will almost guarantee the tyrant will take priority in initiative, and give a chance to instant kill its targets. With talons you can reroll dice to hit. The tyrant can even punish units for causing wounds to it in melee...
[url]http://tomahawc.wordpress.com/2012/08/02/giant-flying-roaches/[/url]