Helios Duo Megistus

You can Special Summon this card (from your hand) by Tributing 1 "Helios - The Primordial Sun". This card's ATK/DEF become the number of banished monsters x 200. During the End Phase, if this card is in the GY because it was destroyed by battle and sent there this turn: You can Special Summon this card, and it gains 300 ATK/DEF.