The first skirmish would be fought using the Warhammer 8th edition rules, though I had the softback Warriors of Chaos army book, which was 6th or 7th edition. We played a scenario from the General's Handbook, which was a straight-forward battle but with the chance of lightning hitting units at the start of each turn, causing damage and preventing them from moving.
The battle ended in typical Warhammer fashion, with practically every unit destroyed. Both sets of knights had crushed everything in their path, Vorghan had valiantly led his troops into battle, and much blood had been spilled to honour the gods. They (somehow) decreed it was a narrow victory to Sven, but were so disgusted with his feeble performance that he was gifted with stupidity. Both armies were rewarded with reinforcements - Sven would be joined by three skullcrushers while Vorghan attracted a chariot. After totting up the points we realised this was already a bit skewed, so Matt valiantly sacrificed a unit of spawn, to make it a little more balanced in future encounters. We felt that neither general had proven worthy of reward, but Vorghan's knights had been valorous combatants and would gain a small reward. And the raging storm? It had no effect whatsoever - only in the last turn did lightning strike, and then harmlessly into the ground.