ChatGPT includes flavor text if you just ask it to write the full card JSON, but I find it kind of uninspired
Kindred Summons Kindred Summons is high risk, high reward
There is also a bunch of cards that you could argue a case for being card quality effects even if they are a little unconventional in how they operate and offer such things to you

Akroma, Vision of Ixidor Alchemist's Gift Alela, Artful Provocateur Animus of Predation Aragorn, Company Leader Arvad the Cursed Assassin Initiate Astarion, the Decadent Atraxa's Skitterfang Atraxa, Grand Unifier Atraxa, Grand Unifier Atraxa, Praetors' Voice Barrowgoyf Basilisk Collar Blacklance Paragon Bleeding Effect Bonepicker Skirge Boot Nipper Cairn Wanderer Case of the Gorgon's Kiss Cloak and Dagger, Entwined Contortionist Otter Storm Crossway Troublemakers Crystalline Giant Deadly Wanderings Dissection Tools Eater of Virtue Egrix the Bile Bulwark Gifted Aetherborn Grasping Shadows Grimdancer Gwenom, Remorseless Henrika, Infernal Seer Indominus Rex, Alpha Judith, Carnage Connoisseur Kathril, Aspect Warper Leyline Prowler Locke Cole Majestic Myriarch Multiclass Baldric Nethroi, Apex of Death Nethroi, Apex of Death Nezumi Prowler Nighthawk Scavenger Odric, Blood-Cursed Odric, Lunarch Marshal Preacher of the Schism Qarsi Revenant Rattleback Apothecary Rayami, First of the Fallen Ready // Willing Ready // Willing Rodolf Duskbringer Scarblade's Malice Selective Adaptation Sorin, Imperious Bloodlord Soulflayer Super-Adaptoid Sydri, Galvanic Genius Syr Vondam, the Lucent Thanos, the Mad Titan Thieving Varmint Thunderous Orator Tomebound Lich Toxin Analysis Trench Stalker Unraveling Mummy Urborg Scavengers Vampire Nighthawk Vampire of the Dire Moon Vault of the Archangel Verrak, Warped Sengir

Collector Boosters were introduced in Ravnica Allegiance and made a regular part of sets from Throne of Eldraine onwards