Great drama is at the core of the Gaming Experience. The character’s can’t be fighting the destruction of the world every session (though that can be fun), but there is great fulfilment in the climatic scenes of a campaign or long term adventure. Every climax is not seen in terms of violence (though it is very common). The personal stories of PC’s and NPC’s should also have meaningful expression in adventure climaxes. Yet all Climaxes in a campaign have similarities.
World Packs are the ONLY WAY TO GO!
A PC Conjurer or summoner, basically any mage whose sole purpose in life is summoning creatures to aid in battles and various situations, is cursed with a hex, and needs to find a way to undo the curse...before he goes mad, or his fellow PCs throw him out of the party, or worse.
Everything he/she summons, never goes away. So you'll have to figure out what the heck to do with that dire bear or fire elemental once it's done fighting the orcs for you. Eventually a caravan of bizarre creatures either annoyingly ends up following the summoner around, or they go off to cause mayhem elsewhere. Bad news for the poor spell-caster regardless.