HIVEMIND FAST ATTACK CHOICES
GARGOYLES
It was bad enough that Tyranids were really fast and deadly on the ground. However, when the Third Edition of 40K rolled around, they were also given horrid little monsters to torment you from the sky. These winged pests originally had flamer-template weapons that ignored cover. Ugh.

Armies of the Warhammer 40,000 Universe
Black Templars
Dark Angels Orks
Catachans
Dark Eldar Space Marines
Chapter Approved
Eldar Tau
Chaos Space Marines Imperial Guard Tyranids
Daemonhunters Necrons Witch Hunters