I never quite caught this before. Take a look at the top two suggested levels of the Legion of Mithras. An initiate has just reached the penultimate suggested level for a player.
Mystagogue: "Now you will learn the secrets of making your own body or mind your talisman."
The initiate learns Inscription on the Soul. Cool! Now the initiate enchants his/her body/mind as a talisman to take advantage of this new Virtue. Things are going well. The initiate likes this new Virtue and is progressing to the ultimate suggested level for a player.
Mystagogue: "OK, now you will sacrifice your talisman to gain even greater understanding and power."
Initiate: "Say what???"