Ancient Gear Hunting Hound [RATE-EN013] Common BT3-082 change it to Defense Position

change it to Defense Position at the end of the Battle Phase

that specifically lists the card "Dark Magician" or "Dark Magician Girl" in its text

Breaker of the Coil

1 of your opponent's Digimon gets -2000 DP for the turn

or Main Set Extended-Art (Rare or Mythic)

Ancient Gear Hunting Hound [RATE-EN013] Common BT3-082 change it to Defense PositionSet: Raging Tempest Card type: Effect Monster Rarity: Common Attack: 1000 Defense: 1000 If this card is Normal Summoned: Inflict 600 damage to your opponent. If this card attacks, your opponent cannot activate Spell Trap Cards until the end of the Damage Step. Once per turn: You can Fusion Summon 1 "Ancient Gear" Fusion Monster from your Extra Deck, using monsters from your hand or field as Fusion Materials.