Im not sure I understand how the Carnosaurs "Pinned down" ability really works. Does this mean I only have to lands the hit rolls or do I need to hit, wound & pass the armor save rolls aswell? Cheers!
Yeah, you only need to hit. Compare it, for example, to the selfless protector ability of the eternity warden, that kicks in when a slann "suffers a wond", not "is hit".