Often, they are used to play the card game, where they can get damaged and dirty, but also fulfill the measure of their creation
Valakut, the Molten Pinnacle Mono-red decks can get Valakut, the Molten Pinnacle up and running without much trouble, though multicolor decks are going to need Prismatic Omen or some similar effect to make this happen regularly
Ok Victini V [Prize Pack] #25 (Pokemon Sword & Shield) Details All prices are the current market price
This year saw a major dip in preconstructed decks, true enough
The Black & White series introduced Pokmon-EX and the powerful Ace Spec cards
For example, the most obvious case I can currently think of is Mad Party because now you can afford in an ideal world- discarding all your 16 Mad Party members and then using Ditto to deal massive damage for just one double colourless energy