Lore3 Level 9 monsters
While you control another face-up monster, your opponent cannot target this card for attacks or effects. If this card has "Number 71: Black Hole Gate" as an Xyz Material, it gains this effect.
● When this monster is Xyz Summoned: You can search all players' Decks, Extra Decks, hands, Graveyards, and Banished Zones and target 1 monster; Special Summon the target (the target is treated as if it was properly Special Summoned, Ritual Summoned, Fusion Summoned, Synchro Summoned, or Xyz Summoned), and if the target is an Xyz Monster, attach all Xyz Materials attached to this card to the target. When this card leaves the field, return the target where it was originally Special Summoned from. You can only activate this effect of "Number C71: Event Horizon Tesseract" once per Match.