Wait for a sign from Gozer the Traveller; he will come in one of the pre-chosen forms.
During the rectification of the Vuldronaii, the Traveller came as a large and moving Torb.
Then, during the third reconciliation of the last of the Meketrex Supplicants,
they chose a new form for him -- that of a Giant Sloar!
Many Shubs and Zuuls knew what it was to be roasted in the depths of the Sloar that day I can tell you!