I think I'd just up 2 of your existing d8s into d10s, but that's just me.  Among other things, you can spend 2d12 to immediately bring a scene to an end and let the villain escape or otherwise have the scene narrated out by whoever was winning at the time. ^^<br/><br/>And I think it probably would be a good idea to narrate Silver Spider getting complicated out of the scene, but I'm probably a bit biased since I'm the one complicating her out in the first place. :P