Forum:Tech Genus Halberd Cannon/Royal Oppression vs Red Nova Dragon

As stated in title, I was wondering about this and..... sorry if this has been asked before. My question is, when red nova is synchro summoned, or special summoned by his own effect and cards like TG halberd cannon or royal oppression tries to negate red nova's summon, what happens? since Red Nova states that it cannot be destroyed by opponent's card effects. Thanks-in-advance.