Altar of Souls:
Ordinary-looking, but this altar has seen many bloody sacrifices.
There is transparent space where you can place an Apparition Stone (Lv. 88), an Apparition Stone (Lv. 93) and an Apparition Stone (Lv. 98).
Place an Apparition Stone (Lv. 88) there Place an Apparition Stone (Lv. 93) there Place an Apparition Stone (Lv. 98) there