For the longest time, players had a quite unfair option to shut down all GY effects, but Konami decided that Abyss Dweller was an unfair card , and it is currently not legal in competitive play
"Banish, on your side of the field or Graveyard, monsters listed on a Fusion monster, then Fusion Summon that Fusion monster on your side of the field
Considering non-foil copies of Geths Grimoire are still readily available for $2, this $20 price tag seems more like a case of low supply than one of high demand
Its a blend of passion, patience, and the promise of financial appreciation
That said, the Pokemon Flute Item Card from the Mythical Island expansion pack can help curb this a little, forcing the opponent to take a Pokemon from their discard pile and put it on their bench
You have to respond with Aboleth before the Bane of Progress enters the battlefield - with the creature spell still on the stack