The cards in my collection often change in large quantities I have 4 to 6 easy to get beginner decks
Im including plenty of other ways to control other problem permanents: Despark, Anguished Unmaking, and Utter End are great because they exile as well, and can even take down creatures if needed
Enough communal belief from the mortal races changes the fabric of reality, and can create or destroy gods, making it as if they had always existed, or never existed at all
You don't choose a target at the time Undercity Eliminator's ability triggers
In fact, Invoked cards are usually an engine for a Deck with little to no reliance on Normal Summoning examples include Windwitch, Thunder Dragon, Dogmatika, and Shaddoll