[ Ratio doesn't doubt that Rin knows what she's talking about. At the very least, she knows more than he, because all he knows is what Ereshkigal has told him. It isn't much, but he trusts that she's not lying about his safety. Hence why he agreed in the first place. ]
The contract allows a Master to provide energy—or mana in your terms—to a Servant, and in return, they are given Command Seals with which they can guarantee a Servant's complete obedience three times. The commands must be narrow and precise, otherwise their effectiveness diminishes, and they can be used to empower the Servant as well as obstruct or do harm to them.
Because the construct that fuels the contract does not exist here, I have been told that the toll on my body may be greater than usual. However, I have been assured that it will only exhaust me and will not place my life in danger.
She has explained other benefits and downsides to the contract, but as this is a consensual binding, nor would there be reason for other Masters or Servants to target me, it is irrelevant.
no subject
The contract allows a Master to provide energy—or mana in your terms—to a Servant, and in return, they are given Command Seals with which they can guarantee a Servant's complete obedience three times. The commands must be narrow and precise, otherwise their effectiveness diminishes, and they can be used to empower the Servant as well as obstruct or do harm to them.
Because the construct that fuels the contract does not exist here, I have been told that the toll on my body may be greater than usual. However, I have been assured that it will only exhaust me and will not place my life in danger.
She has explained other benefits and downsides to the contract, but as this is a consensual binding, nor would there be reason for other Masters or Servants to target me, it is irrelevant.