A Changeling, also known as an “oaf”, is a fey creature sometimes switched with well-bred human infants in order to strengthen the fairy bloodline. It tends to start out looking identical to the child it replaces, but as time goes on and the fairy’s magic wears off it becomes increasingly ugly and deformed, sporting long, sharp teeth and hideous, bulging eyes. It goes through puberty as normal, but its height tends to remain stunted throughout its lifetime. Known to have a ravenous appetite, a changeling often eats its surrogate family out of house and home, and is frequently ill-tempered and prone to angry outbursts, in part due to real or perceived persecution. Occasionally, a changeling goes back to live among the fairies when life in human society becomes intolerable, though most forget their origins and live on as ugly humans. Due to its fey lineage, many even become powerful illusionists.