Previous Versions can be found here.
Expulsion is an Integrity deck specific effect card. It allows the owner to put an enemy card back into the opponent's hand,
Expulsion can be used to remove expensive monsters from play and/or to make the opponent have a full hand, making them lose the next drawn card. It can also be used to kill the targeted monster if the opponent already has a full hand, without triggering any dust effects.
Keep in mind that returned cards will be turned into their base form and that Magic, Haste, or Charge effects can be reused.