Duza the Meteor Cubic Vessel

If this card is Normal or Special Summoned: You can send 1 "Cubic" card from your Deck to the Graveyard. Once per turn, during either player's turn, if a monster was sent to your Graveyard this turn while this card was face-up on the field: You can make this card gain 200 ATK for each monster with a different name in your Graveyard, until the end of this turn.