[Frostmourne27]

Its an interesting idea, and spells that allow for victory have a certain degree of merit. Unfortunately, your current setup allows for a nation to put the nexus up, maintain it for maybe 5-10 turns, cast 380 gems worth of spells in one turn, and then win. Maybe if they were globals that had to be run concurrently or something, but as you suggested, amassing gems and casting them all at once could bring about a rather sudden end to the game. Also, how would this work with dominions victory conditions? Remember, as things stand now, you choose one, or none, and conquest is always an option. It's, regrettably, not a checklist. Still, I like the concept. You could add it to the Dom4 wishlist, although I doubt Dom4 will happen, so that may not accomplish much.