Wightprincess (MP17-EN197) [2017 Mega-Tins Mega Pack]

This card’s name becomes "Skull Servant" while it is in the Graveyard. If this card is Normal or Special Summoned: You can send 1 "Wightprince" from your Deck to the Graveyard. During either player's turn: You can send this card from your hand or field to the Graveyard; all monsters currently on the field lose ATK and DEF equal to their own Level/Rank x 300, until the end of this turn.