Swamp Thing: A 9th Level Adventure for 5th Edition

The evil oni Ozgen discovered a baby hydra while traveling through the swamps. Determined to raise it as a pet and use it for nefarious purposes, he disguised himself as a goblin shaman and enlisted the help of a local goblin tribe to kidnap victims to sacrifice to it to increase its size and strength. Combined with his dark magics, Ozgen was able to grow the baby into a formidable beast. Soon, he'll unleash it on the nearby city of Valhenge as a distraction while he raids the king's treasury in search of a powerful magical item he covets. Unfortunately for him, his goblin minions kidnapped the daughter of a prominent merchant noble drawing the ire of her father. He's put out a call for adventurers to seek out and save his only child from the evil goblins who have taken her. Unless he can deal with these interlopers, Ogzen's plans will never come to fruition.