I am a spiritualist and I want to make my phantom into a lich. Is this feasible? He would be willing but doesn't have his body. Also could I be the vessel for his soul that way he is still bound to me? I dont want to give him independence. Essentially I want to make him a lich slave.
“Lich” is an acquired template that can be added to any living creature (referred to hereafter as the base creature), provided it can create the required phylactery.
Each lich must create its own phylactery by using the Craft Wondrous Item feat. The character must be able to cast spells and have a caster level of 11th or higher.
The phantom is not capable of creating the phylactery, as it cannot cast spells, and a lich must create its own phylactery.
Moreover, a lich can only be made from a living creature. As an Outsider (phantom) type creature, technically phantoms are living, but they are also described as once-living (read: no longer) spirits (read: a type of undead creature). This is a rather weird and awkward situation, and I don’t really know why Paizo went with Outsider type (but probably due to the extensive immunities that undead enjoy), but I would guess that most DMs would not rule a phantom as living, even if it is an outsider.