Coldsnap was received poorly at the time but I think it has aged wonderfully

Aang and Katara Aang and La, Ocean's Fury Aang, A Lot to Learn Aang, Air Nomad Aang, Airbending Master Aang, Destined Savior Aang, Master of Elements Aang, Swift Savior Aang, at the Crossroads Aang, the Last Airbender Absolute Virtue Abstruse Archaic Aeon Chronicler All-Seeing Arbiter Animus of Predation Arahbo, Roar of the World Arahbo, the First Fang Argyr, Tidal Spinner Autumn Willow Avatar Aang Avatar Kuruk Avatar Kyoshi Avatar Kyoshi, Earthbender Avatar Roku Avatar Roku, Firebender Avatar Yangchen Avatar of Discord Avatar of Fury Avatar of Growth Avatar of Hope Avatar of Me Avatar of Might Avatar of Slaughter Avatar of Will Avatar of Woe Avatar of the Resolute Body of Knowledge Burning Sun's Avatar Child of Alara Cloud of Darkness Daughter of Autumn Death's Shadow Deity of Scars Demigod of Revenge Deus of Calamity Diluvian Primordial Divinity of Pride Dominus of Fealty Doubtless One East Wind Avatar Ebon Praetor Essence of the Wild Ethereal Champion Evra, Halcyon Witness Excruciator Fell Shepherd Gaea's Liege Gandalf of the Secret Fire Gandalf the Grey Gandalf the White Gandalf, Friend of the Shire Gandalf, Goblins' Bane Gandalf, Party Guest Gandalf, Shadow's Foe Gandalf, Spark Starter Gandalf, Wandering Wizard Gandalf, Westward Voyager Gandalf, White Rider Ghastlord of Fugue Gishath, Sun's Avatar Godhead of Awe Hades, Sorcerer of Eld

8 Mystic Confluence This is an extremely flexible draw spell that also pulls extra work as a potential counterspell and tempo card
For one mana, you get a mostly-turned on mana creature that also prevents graveyard shenanigans and fiddles with life totals to boot
Your opponent has agency to stop it from happening
(And there are also a few loose Chinese cards, like the Pikachu card of the Pikachu World Collection 2000 set mentioned before)