You can Special Summon this card by Tributing 1 "Helios Duo Megistus". This card's ATK and DEF are each equal to the number of removed from play monsters x 300. After this card attacks, it can attack once more if your opponent controls a monster. If this card is destroyed by battle and sent to the Graveyard, Special Summon it during the End Phase and it gains 500 ATK and DEF.