Instead of a new building why not add on to the old one? imagine the dark storage with a divider in the middle, it holds the same as before but now you can hold both in one. But instead of it taking up its normal space it will expand the same space as the TH.
Dark/Light Storage
Level Capacity Hit Points lvl 7 10,000 3600 lvl 8 20,000 3800 lvl 9 40,000 4000 lvl10 80,000 4200 lvl11 150,000 4400




