Combine Corpses

The caster must take the corpses and cut them into however much they need or want sections with the dagger. They then place the body parts, which have been arranged in the way the caster likes into the clay and seal it. They then take 10 minutes to cast the spell envisioning the form they want the creature to come out with.

They now roll a percentile dice. On a 1 - 55 the creature bursts out as a monster of with the appearance and stats of the DM's choosing and attacks the caster and any who attempt to protect them, not stopping till the caster is dead. If remove curse or dominate monster is cast on the creature it crumples into a pile of ash. On a 56 - 100 the creature emerges out of the clay as a baby form of the creature. After one year it has reached full maturity with stats of the DM's choosing. It treats the caster like a child to a father.