Gargoyle Brood

May move over any terrain without penalty as they fly over it. Gargoyles cannot double their movement by running or charging. 
Gargoyles may leave the table during the movement phase and the models are removed. They may be placed anywhere on the battlefield in the Tyranid players next movement phase, even into close combat. May not make any other movement that turn but can shoot and fight normally

Gargoyles get +1 WS when they charge or come down from the sky into combat.
Gargoyles can disengage from close combat without incurring any blows against them by flying high at the start of their next movement phase