Soul of the Supreme Soldier
You can send 1 "Black Luster Soldier" monster from your hand to the Graveyard; until your opponent’s next End Phase, this card’s ATK becomes 3000, also its name becomes "Black Luster Soldier". You can banish this card from your Graveyard; add 1 "Knight of the Beginning" or "Knight of the Evening Twilight" from your Deck to your hand. You can only use each effect of "Soul of the Supreme Soldier" once per turn.