One of these is probably more relevant than the other.
Yu-Gi-Oh! ZEXAL Volume 8 (March 1st, 2016)
Number S39: Utopia the Lightning
3 Level 5 LIGHT monsters
You can also Xyz Summon this card by using a Rank 4 “Utopia” monster you control as the Xyz Material. (Xyz Materials attached to that monster also become Xyz Materials on this card.) Cannot be used an Xyz Material for an Xyz Summon. If this card battles, your opponent cannot activate cards or effects until the end of the Damage Step. Once per Chain, during damage calculation in either player’s turn, if this card battles an opponent’s monster while this card has a “Utopia” Xyz Monster as Xyz Material: You can detach 2 Xyz Materials from this card; this card’s ATK becomes 5000 during that damage calculation only.
Yu-Gi-Oh! 5D’s Volume 9 (April 5th, 2016)
Stardust Chronicle Spark Dragon
1 Tuner Synchro Monster + 1 or more non-Tuner Synchro Monsters
Must be Synchro Summoned, and cannot be Special Summoned by other ways. Once per turn, during either player’s turn: You can banish 1 Synchro Monster from your Graveyard; this card is unaffected by other cards’ effects for the rest of this turn. If this card in its owner’s possession is destroyed by an opponent’s card (by battle or card effect): You can target 1 of your banished Dragon-Type Synchro Monsters; Special Summon it.