Mail from Zeki

You're Reth's friend, right? Listen up, you're gonna deliver this cake to Reth and ONLY to Reth. It's literally poison to anyone else! And you wouldn't want a poisoning on your hands, would ya? Yeah, I thought not. Just bring this delectable baked good to the congenial cook. And mum's the word to anybody else! Oh, and did I mention this is definitely a cake?