DM Notes: The bowl is literally the crucible needed to re-forge the broken key. For this challenge the party will need to place all four of the key fragments into the bowl and then free the elemental and lure it into engulfing the crucible. Once that happens the elemental will be consumed and the key will be restored. All four fragments must be in the bowl for this to work. Any less and nothing happens.
If the elemental is instead slain by the party it will reappear in the circle one round later (and the circle will be restored of any damage it may have taken as well) effectively resetting the encounter.
Once the key has been re-forged, a keyhole will appear in the north wall of this room. Once the key is placed into the keyhole and turned, the tumblers will wail and the party will be teleported to the actual “tomb” of Athganazar. If lured into the crucible:
The elemental lumbers into the crucible, arms surrounding the rim, legs dropping into the heap of keys. Its eyes stretch downward as if tears and its gaping maw crackles with embers. A fiery blaze fills the crucible, the elemental disappearing among the smokeless flames. Suddenly, the warm light of the fire is extinguished. Among the ashes you see an ivory key.
Once the key is lifted from the ashes, they will notice that the head of the key is carved into the head of a skeleton:
As you turn the key over in your hand, you note that the skeletal head of the key has reflective eyesockets, iron fangs, and a crown inset with six prismatic gems – ruby, topaz, sunstone, emerald, sapphire, amethyst. Iron fang-like prongs jut out into the darkness at jagged angles.
Once the key is inserted and turned:
The eyes of the key ignite in a bright burst as the floor swirls into a rainbow portal. You fall in.