Board Thread:Warhammer 40k General Discussion/@comment-7186329-20130329164207/@comment-6078851-20140719131313

i'm not sure about ork morale being an issue: the only thing i can think of that would cause low morale would be orks unable to have a scrap, which, because of their numbers and the fact that any ork in range is a viable scrap, is probably unheard of :P

orks have advantages in facing tyranids like their numbers, their speed and method of procreation, and their natural ability for violence. but these advantages could end up being disadvantages - tyranids consume orks, after which they have access to the ork genome and then start producing orky-tyranids. this is what happens in 'the shape of the nightmare to come', which produces a schism in the tyranid race - there's the old 'purestrain' tyranids and the new orky-tyranids, which don't have a hive-mind. this new strain of tyranids ends up being so deadly that the 'purestrain' tyranids, under the direction of the hive-mind, flee the galaxy!