Editing MidHammer 40,000 (section)

===Tyranids===
The Great Devourer still lurks around the galaxy eating planets, but there are many things that can challenge their presence in the galaxy. For one, the Emperor is alive, and while He can't really direct His troops personally against the 'Nids, He is still the most powerful psyker in the galaxy, and it stands to reason He can devise multiple strategies to mess with the tyranids' sense of direction and inhibit the hivemind's control, limiting Tyranid effectiveness even in large swarms. Not to mention Magnus is still loyal, and he could be one of the greatest assests Mankind has against the Hive Mind.

While the original death of Tyran still occurred despite the God-Emperor's cryptic warnings of the coming "herd", the battle for Macragge went far better than in OH with Guilliman going boots on the ground to fight alongside his sons and tearing the head of the Swarmlord off at the climax of a brutal duel with the mighty beast, giving the Hive Mind brain freeze and allowing his Ultramarines to rout the Tyranids and, by chance, discover that slaying certain Tyranids had an extremely pronounced effect on the larger swarm. The successive elimination of so many synapse 'Nids one after the other in such a short space of time utterly broke Hive Fleet Behemoth's attack and the Tyranids were exterminated from the planet and the sector. The ships of Behemoth were reported to have actually ''fled'' during the escalating rout, and the Hive Fleet has not been seen in Imperial space proper since. Roboute and his Ultramarines left a lasting impression on the Great Devourer, it seems. This is not to say they scared all Tyranids away; Hive Fleets like Kraken and Leviathan continue to reach into the Imperium to devour worlds, but the distinct colours of Behemoth are giving anywhere with Space Marines a very wide berth. And the Tyranid threat will not arrive in one all consuming wave of pure, undiluted sadness, but will be a bit more disorganized, and arrive in waves. Because there cannot be light at the end of the tunnel if you have been eaten by an endless tide.