"Sisters, today, God has given us a gift. One that will bring us closer to him than ever before. Accept his gift. As you wait your turn, pray to him. Thank him for this marvellous gift."
The nuns lined up on their knees, and prayed until it was their turn to take "his gift," one by one, they opened their mouths and accepted the hive mind parasites.
(The slugs may overflow for a moment, don't worry, they'll make their way down eventually.)