I am working on a campaign (see my post regarding it in the campaign section.) and I need some good fluff. So, if you want to help, I will post a planned scenario and then I have a little, contest to see who writes the best fluff. Anyone who wants to help I would be greatful to.

here is one of tye scenarios I have planned.
fluff for any and or all of the armies. thanks again if you are helpin.

Tyranid raid on Hive Vertalin.
The tyranid swarms attacked hive vertalin in an attempt to insert spore mines into the water system and kill everyone in the city for easy harvesting. Obviosly, the Imperial Gaurd can not allow this to occur, they must stop the Tyranids and drive them out of the water facility. The space marines are attempting to place charges in the building to blow it into shrapnel, stopping the tyranid attack.

Objectives
Tyranid Major Victory 6 spore mines inserted into the water system.
Tyranid Victory, 3 spore mines inserted into the water system

Imperial Gaurd
Major Victory: No spore mines inserted, space marines not allowed to blow up the water facility.
Victory less then 2 spore mines inserted, into the water system

Space Marines
Major Victory: Facility destroyed
Victory No spore mines inserted

the nids have a limited number of mines, 20 to be exact. (of course, it depends how the campaign goes, if it goes well for the nids, there will be more, bad for em, less)