Heavy Metal Raiders

The first time each DARK Machine monster you control would be destroyed by battle each turn, it is not destroyed, also if you take battle damage from that battle, that monster gains that much ATK. Once per turn, if a monster you control whose original Attribute and Type are DARK and Machine destroys a card(s) on the field by battle or by its own effect: You can Special Summon 1 DARK Machine monster from your hand.