I am about 50 turns into an easy setting game using the Guardian wizard. I picked up shard sight somewhere around turn 30 and it has worked fine up to this point. After placing my 3rd city the SK told me that the only way to stay in good graces was to give up some of my life essence. After agreeing to do so the shards that were not directly in my line of site via outpost or city are no longer in my line of site. Is this a bug or did the sacrifice to the SK remove my perk?