I know, it was surprising to me too.

[The half-joke got a half-joke in response.]

If you somehow used up all three Command Seals, the contract between Master and Servant is ended. Command Seals are a very useful tool for pulling off incredible feats during the Grail War, so it's worth saving them. Though, ah, you can also use them to force me to do any action. If you use a Command Seal, I can't disobey.

[Bedivere did look uncomfortable as he said that, though.]