Think about it this way: if youre wanting to see at least one copy of that card each game, you need to put four of them in
I mean, even if youre doing nothing crazy, its basically the best part of Sword of Feast and Famine but without needing creatures and without being very interactable
Later in the game, you can have a greater toolbox, with different exiled creatures that can provide card draw, bounce, removal, or just size
I understand that not everyone has a fondness for foreign cards in EDH, Legacy, or any other format
Pokemon Paradox Clash Tin (Iron Leaves Ex)
There are deck-building machines back in the Professors lab that unlock opponents decks, but you need the cards in your inventory for the machines to make said decks