Aquarian Alessa (TAEV-EN020) - Tactical Evolution Unlimited

"This card is treated as a Normal Monster while face-up on the field or in the Graveyard. While this card is face-up on the field, you can Normal Summon it to have it treated as an Effect Monster with this effect:
When this card destroys an opponent's monster by battle and sends it to the Graveyard they discard 1 random card.."