Monsters:
Catoblepas:
Giant bull. Breath poison of oozing wounds and blood vomiting.
Cockitrice - Giant flightness bird that looks like an ostrich. Touch poison with necrosis and paralysis.
Basilisk - Giant lizard with a crest and huge teeth. Breath poison with necrosis and paralysis.
Biscione - Human with a snake-tail instead of legs. Sort of like an upside-down snakeman. Counts as a sort of animal-man for tribes.
Salamander - High homeoterm. Fire immune, but not dragon-fire immune or lava immune. Skin is coated in fever-poison.
Pegasus - Winged horse. You know the drill on it.
Amphisbaena - A scaly chicken with a snake head comming out of the neck and another at the tip of it's long tail. Eats vermin.
Orochi - Snake with eight heads and eight tails. Optional: give each head a different venom. Optionalx2: Make it giant and turn it into a megabeast.
Abatwa - Tiny people that ride ants around. Possibly a sort of vermin.
Semi-Megabeasts:
Sphinx - Lion shaped body. Has two heads, one shaped like a person and one shaped like a snake, located on the tail. Can talk. Has wings and can fly. Spheres of [trICKERY], [SPEECH] and [trUTH]
Megabeast:
Gorgon - Always female, just like harpies. Humanoid. Three kinds of poison: Injected of impaired vision, dizziness and fever. Breathe poison of paralysis and numbness. Touch poison of bleeding, pain and blisters. Can talk and use weapons. Shperes are [DEFORMITY] and [JEALOUSY].
Manticore - Scorpion's tail that has injected paralysis venom. Flies. Covered in poisonous spines which are covered in paralysis causing secretions. Shperes are [DISEASE] and [trECHERY].
GREK, FUCKING DESCRIBE THEM PHYSICALLY, AND CORRECTLY.
Anyways these are add-ons to his things.
Cockatrice, larger than a chicken, created when a chicken egg is incubated by a toad, it is a demonic chicken with piercing yellow eyes, when touched ( by skin, or flesh ) petrification occurs, on the new moon, looking into it's eyes, or hearing it's hiss may petrify, the only cure is eating a lizard before full petrification.
Basilisk, a six legged alligator, really fast, can cause petrification, but forgot how.
Salamander, an ever burning slamander, spirit of fire.
Dude, that is not a sphinx, they don't have snake tails, you are talking about a gorgon.
The leviathan is a humongous serpent ( via description ) , can boil the sea with it's flaming breath, it's body spews miasma.
You got Behemoth right.
And Jormungandr, it is a giant ass snake/worm, touching it will kill you, breathing it's breath, YOU DIE, it is called the World Serpent for a reason! And can cause the apocalypse, if awoken... or found.
Ziz, a giant griffin, that can cover the sun with it's mighty wings, protector of all birds, and is immortal.