A five-headed serpentine Guardian added with the Pyranthos update — Astraeos's endgame boss, requiring player level 90 at every difficulty.
Each head breathes a different element — fire, ice, dark, lightning and poison — and all five can fire at once, which is why the fight is decided by where you stand.
Always try to stay behind the Hydra to avoid its main bite and elemental attacks.
Bring high-level Therizinosaurus or 
Bison, very strong tame if you combine good saddles with the pack buff, or 
Deinotherium, as they are quite big, so harder to manage. Carnivores like 
Rex, 
Deinosuchus, or 
Fasolasuchus are also high tier; using carnivores will take more damage. To compensate, you can have a tribemate with a 
Daeodon to sustain, and use extinguisher grenades to reduce fire damage taken. ensure they have strong saddles for protection against elemental damage, and utilize a 
Yutyrannus for courage buffs. Focus fire on the Hydra, utilizing 
Medical Brews for self-healing.
Stegosaurus holds the front while 
Deinonychus stack bleed from the rear, whose bleed damage scales independently of their melee stat.
Sweet Vegetable Cakes keep the herbivores standing; a Daeodon or two covers everything else.
No tips here yet — be the first survivor to leave one.
Leaving tips is for survivors on the rewards list — reserve your rewards with your e-mail once and the form unlocks everywhere.
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