Okay, just want to clarify that this combo works. Should also work if you have the Doppleganger promo + another Strength Enemy.
Situation: Prophecy was in effect (but could just be a regular draw 2 space or you have Fiend Slayer). Sorceress moved to Sentinel, drew Nightmare + Shadow. Both have the number 3 on them, so they fight as a team, right? Nightmare = character's Craft (with all bonuses), then you get Shadow Craft 2 (IIRC, but doesn't matter), so the char is always at a minimum 2 disadvantage. Nightmare + Wraith (Craft 5) = stand-off at best (not counting Priest, Cross and Evading Spells), while Nightmare + Lesser Demon is unbeatable, ditto for Nightmare + Demon.
Nasty combo, but by the rules?