Here you go just some rough notes for you to work from
The Nursery
Deep in the heart of the tomb in an obscure room hidden behind a wall. Within are the remains of over four hundred fiendishly deformed children. Each one was once a living progeny of the daemons under the command of the Warlord . Each has magically been turned to stone. If the party enters into the room a
Rune is triggered that releases a dispel magic spell that releases the children from stone.
The ages of the children vary from 3-8 but all once unleashed will attempt to overwhelm the characters and feast on their flesh. Also in the room are 1d4 Flesh eaters who are teenaged deformities preserved in stone.
Children
Deformity Fiendish child ( Human) CR 1/4 Size S (3 ft 4 in); HD 1d6+2; hp 8; Init +2 (+2 Dex); Spd 20 ft.; AC 12 (+2 Dex); Attack +4 melee, or +2 ranged; SV Fort +9, Ref +6, Will +5; AL N; Str 13, Dex 14, Con 14, Int 9, Wis 8, Cha 15. Languages Spoken: Abyssal, Common (Archaic) Skills; Move silently +6, Listen +4, Spot +3 Feats: Weapon focus (bite) Treasure: none Special Abilities: Low light vision, frightful presence.
Flesh Eater Greater Deformity CR 2 Size M (5 ft 4 in); HD 1d6+4; hp 10; Init +2 (+2 Dex); Spd 30 ft.; AC 13 (+3 Dex); Attack +4 melee, or +2 ranged; SV Fort +9, Ref +6, Will +5; AL N; Str 13, Dex 16, Con 14, Int 9, Wis 8, Cha 15. Languages Spoken: Abyssal, Common (Archaic) Skills; Move silently +6, Listen +4, Spot +3 Feats: Weapon focus (bite) Treasure: none Special Abilities: Low light vision, frightful presence, Blood frenzy.
Blood frenzy When a Flesh eater smells, or sees blood they go into a frenzy much like a Barbarians rage ability that lasts either until they have gorged on a victim or until the source is removed. If one flesh eater is injured it will not only attempt to devour itself but will become the target of its fellows.
The room itself is decorated in a perverse facsimile of a nursery with demonic toys, and children’s books with subjects such as torture, or sodomy. Sometimes when a character is not focused on finding the room the sound of children playing can be eerily heard as if resonating from the gloom.