I'll set up the scenario for you, I'm playing my girlfriend and it is her turn. She summons Guardian Trice onto the field via the aide of a Soul Exchange to my Blue Eyes White Dragon then ends her turn. During my turn I activate Monster Reborn and summon my Blue Eyes back from the Graveyard and kill Trice...now what happens now that Trices effect wants to resolve? My Blue Eyes is back on the field, is he destroyed, does Trice's effect negate...?