There i am minding my own business exploring the imp village and then i'm suddenly talking to the necromancer who wants some crystals..errr...?

i thought act 2 was going to be about doing favours for the imps, seems like it might just be finding things for the necromancer?

(i didnt even bother to investigate the imp alchemists house because i thought i'd explore area first, do specific quest type things later..)