The altar of Tiamat.
The center of the altar must have a statue of a dragon representing Tiamat.
all around the statue you must offer seashells and sand.
A bottle of sea water is also placed next to the statue
A large clam shell is used as an offering bowl. And it is important that the sigil of tiamat is painted in the shell.
you must hang a large starfish above your altar to represent the star of inanna the light bringer.