Meirril wrote:
Crafters can participate by either making recipes that will improve the summoning spell (making the portal larger, making items that will attract more clockworks, ect) or by making items that will defeat the creatures that are summoned through the portal. The number of items created for the spell determins the difficulty of the invasion force. The number of trap and weapon items determins if you succeed.
I'd suggest allowing 10 minuites total to boost the summoning spell before it goes off and then continuing to allow people to build defensive items through the event. Depending on the level of success you could have multiple waves of invaders with a payout for each wave successfully defeated with a huge named encounter at the end where crafters if they worked hard enough finish using up all the materials and now become the crew for several cannons to defeat the big mechano-dragon...before it swamps the clockworks sent to hold it in place.
So basically a lot of rush order-like crafting with a visible purpose? I like it. It would build on the idea put forth in the Grotto for the shawl, but hopefully without the horrible effect when missing an event 