Yes, rituals are very particular about what they're being cast for. It is a bit restrictive at times, but it means they're more potent when aligned with its correct function.
However, rituals of this nature do require a great amount of spiritual energy, magnetite, and organic resources - such as blood. Large quantities of it. We can possibly cast it with perhaps a pint or two, but its full effect won't be unlocked with such a meagre offering. If you know where we may get some, that would be helpful.
[Since they would be using the oldest of the oldest rituals, where human sacrifices had been no small thing. Not to say Yamato is expecting a human sacrifice - they had blood banks in their world after all, but he isn't sure if there is one in here]
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However, rituals of this nature do require a great amount of spiritual energy, magnetite, and organic resources - such as blood. Large quantities of it. We can possibly cast it with perhaps a pint or two, but its full effect won't be unlocked with such a meagre offering. If you know where we may get some, that would be helpful.
[Since they would be using the oldest of the oldest rituals, where human sacrifices had been no small thing. Not to say Yamato is expecting a human sacrifice - they had blood banks in their world after all, but he isn't sure if there is one in here]