Because it would be a lot easier to wait, and try to set up a meeting this summer? Or maybe spring hols, if there's time. If the Twins could pick you up and bring you somewhere.
Because
1. I'd need some of your blood to make the ring 2. There's a spell you have to cast on it to make it work properly and I'd want to show you, not try to explain in a letter 3. I'd want you to be able to test it out so you knew the spell had it working 4. Which means I couldn't give it to you with the venom IN it and getting the venom in is tricky.
Anyway this would all be easy enough if I were going to see you in person.
Re: I Solemnly Swear That I Am Up To No Good
Because
1. I'd need some of your blood to make the ring
2. There's a spell you have to cast on it to make it work properly and I'd want to show you, not try to explain in a letter
3. I'd want you to be able to test it out so you knew the spell had it working
4. Which means I couldn't give it to you with the venom IN it and getting the venom in is tricky.
Anyway this would all be easy enough if I were going to see you in person.