From Eldoria, head east towards the towering mountains. The path to the Blighted Peaks is treacherous, filled with 'Blighted Harpies' and 'Rock Golems'. Blighted Harpies are flying enemies that swoop down with claw attacks; use Owl Form's ranged attacks or Lynx Form's agility to dodge and counter. Rock Golems are slow but heavily armored; use Bear Form's powerful attacks or exploit their elemental weakness (they are vulnerable to ice damage).
You'll encounter sections of 'Blighted Ground' that deal continuous damage if you stand on them. Use quick dashes (Lynx Form) or Owl Form's glide to traverse these areas. There will also be vertical climbing sections. Look for glowing 'Climbing Vines' that allow you to ascend. Some sections might require you to activate ancient 'Wind Vents' to create updrafts, which you can use with Owl Form to reach higher ledges. The ascent is long and requires careful navigation.