This is a deep well of design space, take for example, Summon: Shiva which slots into tapper and stun counter decks as well as those looking for a burst of card draw
When Hades is played, you can choose an opposing character that then must be either put on the bottom of that player's deck, or you are able to draw two cards
In that spirit, we have rainbow chocobos: a Travelling Chocobo of every flavor
Those more powerful spells will still cost you, but it may be worth it for extra damage
Playing cards requires players to spend ink from their inkwell, which contains cards players have put in there themselves
This was exacerbated at the end of 2024 when WotC announced that not only there would be 3 Magic Multiverse and 3 UB sets in 2025, but that UB sets would become Standard-legal for the first time