Lucent, Netherlord of Dark World

If this card is discarded to the Graveyard by a card effect: Special Summon it from the Graveyard, then, if this card was discarded from your hand to your Graveyard by an opponent's card effect, you can Special Summon 1 Fiend-Type monster from your Deck to either side of the field.

Fiend DARK Effect Monster 6 effect