Hunting Necrons

So I was reading through the Champions of Fenris supplement which talks about the Necron invasion of Midgardia by Trazyn. One section I found interesting was a little snipit of how the Wolves tracked and hunted the Necrons despite their lack of scent and wraith technology:

**WOLF SENSES**

*Even by the superhuman standards of the Adeptus Astartes a Space Wolf's senses are impressive. They can follow the scent of a creature's passage even when miles away, after days of rain and wind have almost washed the trail to nothing. Sounds in the din of battle can be isolated by their hearing - a conversation hidden under the hammer of guns and the screams of the dying is rendered as clear as if it were spoken to the Space Wolf's face. Their vision too is unparalleled, the marking on a distant aircraft or an enemy hidden by the shroud of night appearing stark and distinct in their eyes.*

*During the desperate fighting in the tunnels of the Emperor's Judgement, the Space Wolves found their Necron foe dangerously elusive. Creatures of living metal and otherworldly energies, the Canoptek Wraiths left little scent and moved with the silence of the dead. Flayed Ones were especially hard to detect, wrapped in the overpowering stench of blood and death that blended with the corpses all around. As cunning hunters, the Space Wolves eventually overcame this disadvantage by learning to detect the absence of smell and sounds the Necrons produced, the voids left by their passing. As Ulrik the Slayer had taught Logan Grimnar long ago, every beast - whether it crawls in the ground or swims in the sea - leaves something to mark its passage. Thus the Space Wolves were able to clear the tunnels and vaults of the Emperor's Judgement despite the Flayed Ones' stealth, finding them where they lurked and tearing them to ruin.*

*Not one of the invaders remained when they were done.*

- **Champions of Fenris Supplement**

I thought it was a rather clever method of tackling the Necrons, using their wildly advanced technology against them. The Necron tech was so advanced that it actually made itself a weakness to something they would view as "primitive". It reminds me of how in the Twice Dead King series during a navel action against the Imperium the Necrons ships shields are so advanced and calibrated to defend against more powerful esoteric weapons that the imperials primitive sold projectiles pass straight through.