"Of course! You're Jeanne d'Arc Alter's Master, after all. How could we manage without your assistance and input!?"
Da Vinci stretched out a finger and poked at the air, as though she were pointing accusingly at Lianye.
"It wasn't that we needed your help with the procedure, but you, as her Master, couldn't be absent. This Spirit Core Reforging for Jeanne d'Arc Alter would involve changes far greater than an ordinary Servant's Spiritron Dress Upgrade, so the workload would be immense, and we would need to prepare much more mana as well. To put it simply—when a doctor performed clinical surgery on a seriously ill patient, they would also make sure there were enough blood bags of the patient's matching blood type, wouldn't they?"
"Are you treating me like a humanoid walking blood bag?"
Lianye helplessly rubbed his forehead. Still, he had caused this mess himself, even if the root of it lay with Caster. Saving Jeanne d'Arc Alter had also been his own decision, so this responsibility was indeed one he could not shirk...
166, Veteran Ladykiller
Normally, the mana supply for Servants summoned by Chaldea's Masters came from Chaldea's core mana furnace. Otherwise, how could Gudao or Gudako, who were deemed lacking in aptitude, possibly possess enough mana to maintain an entire warehouse full of Servants?
The principle was that Servants summoned through the Fate Heroic Spirit Summoning System were actually bound by contracts with Chaldea. Meanwhile, each player, acting as a proxy for a Master's authority, received Command Spells. One Command Spell could naturally regenerate every twenty-four hours, enough to make the Masters in F/Z, who fought until their heads bled over a single Command Spell, green with envy. However, the Command Spells of these proxy Masters were not as potent as normal ones.
But Lianye had