Machine Assembly Line (SBCB-EN076) [Speed Duel: Battle City Box]

All Machine monsters on the field gain 200 ATK. Each time a face-up Machine monster(s) on the field is destroyed by battle or card effect, place 2 Junk Counters on this card. You can send this card to the GY, then target 1 Machine monster in your GY whose Level is less than or equal to the number of Junk Counters that were on this card; Special Summon that target.