Harrow absolutely knows Gideon's preferences, and ignores them thoroughly by explaining: "Moiraine Sedai draws power from an external thanergenic source, and can construct spells with those... building blocks, so to speak."

"As you know, I cannot take in or express out thanergy in the same way--hence the need for your... experiences as a battery." She will not say juice. She will not.

"However, if Moiraine Sedai produces the initial thalergetic magic, I can convert them into thanergy and build analogous workings."