really easy challenge, but the prizes are so useless (again) ! Can't we get options so we can chose something interesting for our own city? We all have a different playing style so I am not suprise to see that most of the time a bunch of players are unhappy about the rewards.
And what chapter are you in? I find everything but the building to be useful in both my chapter 7 and my chapter 17 city. And the building will give more more needed spell fragments when I disenchant it.