Color: Green spell
Location: Sacred home ground - it should have some kind of interesting natural formations that would make it sacred.
Action: Show an army of dragons attacking sacred grounds. The largest, leading dragon is attacking the fortress with a blast of dragonfire that flash-fries some unfortunate warriors. Make sure that this dragon is much larger and more awesome than her breed dragons. Wielding swirling green magic, the shamans are summoning massive beasts to do battle with the lesser dragons of the brood. Some mages could be conjuring massive ice elementals to do battle as well - up to you. The outcome of this battle is far from predictable.
Focus: The battle between humans and dragons.
Mood: Epic scale. An all-out savage brawl with beasts, magic and dragons!