Ludevic, Necro-Alchemist Ludevic, Necro-Alchemist offers an optional source of card draw, and incentivizes players to damage one another
If I was building Izzet Lessons with an infinite budget rather than on a zero rare / $30 budget, the non-land cards in the deck would look almost exactly the same, but the one place the deck would get a massive upgrade if budget wasn't a concern is the manabase, which is currently one tapped dual land and a bunch of basics
Finally, a lot of Black Lotuss value is down to its cultural significance
Theres also Timon, Snowball Swiper and Gramma Tala, Connected to Nature as prerelease promos
Perhaps the pattern of making copies that differ from the original is enough to bar entry into paper Magic, but there's plenty of precedent for copy cards with altered characteristics