Sillva, Warlord of Dark World (Quarter Century Secret Rare) (RA03-EN158) [Quarter Century Bonanza]

If this card is discarded to the GY by card effect: Special Summon this card, then, if it was discarded from your hand to your GY by an opponent's card effect, your opponent places exactly 2 cards from their hand on the bottom of their Deck, in any order.