Shadow Shaman hosts this building selling use a total of 18 items. Heroes sold here vary but he always has 2 soul stones of each for you. Mostly they are bought with gems but occasionally you can get them with gold. There are 18 items for sell here 3 of which are heroes and the rest are green, purple, and gold items that can buy. The store refreshes every night at 21:00 your local time. This store used to become permanent at 9 but I believe now you can unlock it with 600 .