Serpent's Head is the highest level Battleground from Quetzal Palace. All monsters here are resistant to lightning, with the toughest enemy being nearly immune to it.
Dragon Blade
Fiery Axe
Sunder Amulet
Disarm Amulet
Over-sized Belt
Frost Serpent Scalemail
Armored Alicorn
Marble Sky Rock
Meteorite
Insect Wings
Spring Bloom Mushrooms
Dragon Claw
Dragon Tail
Ashen Meteorite
Cloud Skull
Mechanical Bird Blueprint
Enchanted Ring Blueprint
Dragon's Beard
Antique Flowers
Sky Coin
Gala-Bound Chimera Plushie