Okay, so there are a lot of Magic: The Gathering cards to explore, with the vast majority of them admittedly not good or rather unimpactful
6 //// Teferi Akosa of Zhalfir Legendary Planeswalker Teferi 4 +1: Draw two cards
Whenever another nontoken Vampire you control dies, you may pay and exile it
Council of the Soratami is an unplayable sorcery but at instant speed you can entirely mitigate tempo losses by representing countermagic
Disrobing Scepter I used to have a humor piece in The Duelist called "Extra Pulled" where I showed cards that "didn't make it." One of the cards I had there was a card called Disrobing Scepter which acted like Disrupting Scepter, but the opponent had the option to remove a piece of clothing rather than discard a card
Ashiok, Dream Render Preventing your opponents from searching might seem like a niche way to hit cards like Demonic Tutor, but it affects many other cards, like fetch lands and ramp spells