it MUST happen.

Stardust Dragon Scar-left
[Level 8/WIND/Dragon/Synchro/Effect/2500/2000]
1 Tuner + 1 or more non-Tuner monsters
This card's name becomes "Stardust Dragon" while on the field or in the Graveyard. During either player's turn, when a card or effect is activated that would destroy a card(s) on the field: You can Tribute this card; negate the activation, and if you do, destroy it, and if you do, shuffle all cards that would be destroyed by the negated card to the Deck. During the End Phase, if this effect was activated this turn (and was not negated): You can Special Summon 1 Level 8 "Stardust" Synchro Monster from your Graveyard.