The forbidden cards

They arrived in the post both unordered and unordered. The first was a mystery quickly explained, for within the envelope was a letter, which also solved the second.

“Toby, let us play by post. I have already shuffled. Ted”

I turned to the cards and drew the first one. After much deliberation I made my decision, and composed my reply.

“Ted, I have a Killing Power of 87. Toby”

I attached my card so that he could not accuse me of cheating and sent it back to his infernal address.

And then, I waited.