Ostinato
Normal Spell Card
If you control no monsters: Fusion Summon 1 “Melodious” Fusion Monster from your Extra Deck, using 2 monsters from your hand or Deck as Fusion Materials. During the End Phase of this turn, destroy that monster, then, if all the Fusion Material Monsters that were used for its Fusion Summon are in your Graveyard, you can Special Summon all of them.

Source: Ｖジャンプチャンネル on Youtube