Revised Edition brought about one of the strangest printing mistakes in Magic: The Gathering history.
Misprints happen. Any card game, especially in their early years, is going to have them. While Magic still gets a misprint or two here and there, the early years had a bunch. But for one card, Serendib Efreet, the game's Revised Edition had one of the strangest.
The card itself was originally introduced in Arabian Nights and looked like this. And yes, that is the original art:
A 3/4, 3 mana summon effect card, Serendib Efreet stated that "At the beginning of your upkeep, this creature deals 1 damage to you." It depicted an efreet - essentially a demon in Islamic culture, fitting to the Arabian Nights theme.
By the time of Masters Edition, the card changed over from a summon effect to a creature. Then came Eternal Masters, where the card got new art, gained flying, and received new flavor text - "Summoners of efreeti remember only the power of command, never the sting of regret." As Magic had been solidifying what is and isn't a creature for years, this was only to be expected.
The card itself last came out in Jumpstart in 2020, virtually identical to the last big changeup, and will likely be back in the future because of it's early game usefulness for players who have blue as a color. However, the Revised Edition Serendib Efreet still stands out as being radically different. A mix-up over the type of efreet being used made that version's Serendib Efreet use the image for Ifh-Biff Efreet, a card so obscure that it has only been used twice in Magic history - Arabian Nights then just over a decade later in Masters Edition. And just for measure, the very blue card has a green background too, yet with all the usual wording of Serendib Efreet.
In terms of noticeability, it is well above than the simple typos of misspellings of illustrator names that most error cards usually have. It's even right up there with the infamous Wyvern card back printings that happened around the same time in the mid 90s with Fallen Empires.
Still though, considering the expansion it originally came from, it is completely innocent next to the "game within a game" of Shahrazad or how a few of those cards got forever bans in 2020 because reasons best not explored again. But it is still a huge glaring error that was never fixed in a core set no less.
