Target 2 Normal Monsters in your GY; add them to your hand.
Rulings
Individual Card FAQs
You select the 2 Normal Monsters when you activate "Dark Factory of Mass Production".
This card targets 2 monsters.
If your opponent chains an effect like "Disappear" to remove 1 of the 2 selected monsters from your Graveyard, you still add the remaining Normal Monster to your hand.
Spell|
Normal