Borreload Detonation

You can only use this Skill's second effect once per turn. 1: At the beginning of the Duel, add 1 "Mirror Force" from outside your Deck to your hand. 2: If you control "Borreload Dragon" or your opponent controls a monster, play 1 Level 4 or lower DARK Dragon monster from your hand or Graveyard in face-up position.