Graft Flesh( Fiend Folio, p. 207)
You can apply a certain type of grafts to other living creatures or to yourself.
Heal 10 ranks,
Choose a type of graft: aboleth, beholder, fiendish, illithid, undead, or yuan-ti. You must be an aboleth to choose aboleth grafts. You must be a fiend to choose fiendish grafts. You must be an illithid to choose illithid grafts. You must be a yuan-ti to choose yuan-ti grafts. There are no additional requirements for choosing beholder or undead grafts. You can create grafts of your chosen type and apply them to other living creatures or to yourself. Creating a graft takes one day for each 1,000 gp in its price. To create a graft, you must spend 1/25 of the graft's price in XP and use up raw materials costing half of this price.