Answer:
Describes a mysterious region and a stylish pair of shorts.
My first is in blood and also in battle. My second is in acorn, oak, and apple. My third and fourth are both the same. In the center of sorrow and twice in refrain. My fifth starts eternity ending here. My last is the first of last, Oh Dear.
My first half is normally made of stone, my second is crazy, and I taste sweet when complete.
You throw away the outside, eat the inside, then throw away the inside. What is it?
I make you weak at the worst of all times. I keep you safe, I keep you fine. I make your hands sweat. And your heart grow cold. I visit the weak, but seldom the bold.
I am your mother's brother's only brother in law. Who am I?