Sillva, Warlord of Dark World (EEN-EN023) - Elemental Energy Unlimited

If this card is discarded from the hand to the Graveyard by a card effect, Special Summon this card to your side of the field. If this card is discarded from the hand to the Graveyard by your opponent's card effect, your opponent selects 2 cards in their hand, and returns them to the bottom of their DEck in any order.