Two of the more broken decks in Vintage cube, Reanimator and Storm, use the graveyard as a resource and filling that up with 10 cards can often be a huge downside
Then you can discard two cards at the beginning of your first main phase to return this to your hand from your graveyard, which is card disadvantage naturally but with madness, lands, discard triggers like Archfiend of Ifnir, and loads more, it's got value
Saga creatures fuse the legendary summons of the Final Fantasy universe with MTG gameplay
Within the right deck, Delney can essentially be Panharmonicon but cheap and squishy
Pre-sale prices for Kaito, Cunning Infiltrator sat at around $15, which seemed about right
So if two players have two different cards with the same name out, you get to remove both of them with one effect