Future Fusion (RYMP-EN064) - Ra Yellow Mega Pack Unlimited

Reveal 1 Fusion Monster in your Extra Deck and send, from your Main Deck to the Graveyard, the Fusion Material Monsters that are listed on that Fusion Monster Card. During your 2nd Standby Phase after this card's activation, Special Summon 1 of that Fusion Monster from your Extra Deck and target it with this card. (This Special Summon is treated as a Fusion Summon.) When this card leaves the field, destroy that target. When that target is destroyed, destroy this card.