Learn Magecraft

Rin turned to the Archer: "Can you switch to spiritual form?"

Archer nodded, then she disappeared.

You're surprised: "Where did she go?"

"Servants are beings able to switch between a Spiritual Body and Material Body at will. While in spiritual form, their upkeep cost is low. That way I can support her with my Mana only.

To keep a Servant always materialized, other sources are needed. For example, Servant can also intake semen or blood for energy depending on their method of processing it"

You felt so confused as there were many terms strange for you.

Rin smiled: "If you want to stay with me, then I should teach you about magic..."

In the next three days, she taught you a lot of things about Magecraft.

She then summoned Archer again.

"To make effective plan, I need to know your identity. Can you tell me your true name?"

Archer opened her mouth and talked for the first time:

"Sorry, but I don't want to tell that."