When Disinformation Campaign enters, you draw a card and each opponent discards a card. Whenever you surveil, return Disinformation Campaign to its owner's hand.
"People would sooner savor sweet lies than chew plain truths." —Lazav
2018-10-05
Disinformation Campaign's last ability triggers only if it's on the battlefield. It won't return from your graveyard.
2024-01-12
An ability that triggers "whenever you surveil" triggers after you're done surveilling, even if you have fewer cards in your library than the number of cards you're instructed to surveil. It even triggers if you have no cards in your library.