Palworld tower bosses in order: all 8 Key Spheres
Eight faction towers, eight Key Spheres, one final boss. Here's the exact order, level by level, and how the door to the World Tree opens.
Every tower boss in Palworld 1.0 hands you a Key Sphere on the first clear, and you need all eight to open the final door at the World Tree. There's nothing to farm — the spheres come automatically — so the whole thing is really a checklist of eight fights in the right order. Miss one and the endgame door simply won't open.
The eight in level order: Zoe & Grizzbolt (level 10), Lily & Lyleen (20), Axel & Orserk (30), Marcus & Faleris (40), Victor & Shadowbeak (50), Saya & Selyne (55), Bjorn & Bastigor (60) and Auri & Shaolong (68). The first six sit across Palpagos; the last two gate the endgame.
The two that trip people up are numbers seven and eight. Bjorn & Bastigor is the Feybreak tower — beating it is what unlocks Sunreach, because the portal to the sky islands sits at the top of that tower. There's no other way up. Then Auri & Shaolong lives on Sunreach itself as tower eight, and clearing it is what puts you on the Panthalus questline toward the World Tree.
So the checklist reads: six Palpagos towers, then Feybreak to open Sunreach, then Auri on Sunreach for the eighth sphere. With all eight banked and the Sealed Calamity questline done, the World Tree door opens for the level-80 final boss, Zenara & Astralym. If you're following the veteran route, every one of these fights is broken down step by step — counters, HP, the lot.