Traveling to Praxys should be an ordeal. If the party has not yet encountered Sydon’s Fleet, then they should do so on the voyage here. Otherwise, you may choose to run 1–2 random sea encounters during the voyage. Read the following when the party arrives:

After days of sailing into the far reaches of the ocean, the weather turns rough. Powerful storm waves threaten to overturn your ship, rocking it from side to side, and a thick blanket of fog obscures the sea around you. The wreckage of broken ships drifts past your prow, and you begin to wonder whether you will share the fates of their unfortunate crews. Eventually, you notice a beam of light, which seems to sweep the surrounding seas from an immense height. Massive rocks emerge from the fog: the foundations of a gargantuan stone tower. Your ship suddenly feels very exposed—tiny and vulnerable next to the impossible size of the structure which now looms above you. This can only be the Tower of Sydon.