Hunting Saya & Selyne, the Level 55 Dark/Neutral Tower boss? You're in the right place. It's a solid farm, and the whole fight comes down to bringing Dragon and not standing in the wrong spot. Below: exact location, coordinates, weakness, drops, and a fight plan. Here for the coords? First card, right below: -597, 205.
Saya & Selyne is fought at the Moonflower Tower, center of Sakurajima Island, at coordinates -597, 205.
Saya & Selyne is Dark + Neutral, so lead with Dragon damage and you'll carve through its health bar fast. Reliable picks: Jetragon, Astegon. Pack a bow or firearm too, since poking from outside its attack range beats trading hits up close.
Use the free Palworld Breeding Calculator to see every pair that makes the Pal you want, or what Selyne can breed into.