The forbidden cards #2

The cards came back, unbidden, still forbidden, hidden within an envelope made of gibbon’s hide and with ribbons inside.

There was a note paperclipped to the cards and I read it aloud into the gloom: “I, too, have a killing power of 87. You must choose again. I have returned your card and mine. Ted”

I checked the cards. Mine: Colossus. Ted’s: Vampire Bat. Mine: Unsullied by pen. Ted’s: The numbers changed, one by one, by hand, to exactly match mine.

I did not understand.