It changes the math of each turn enough that it requires some double-checking and re-evaluation, which can be a little frustrating for a new player who is still trying to figure out what their cards do
Use this at your own discretion
Abandon Hope Acceptable Losses Big Score Bitter Triumph Bone Shards Cathartic Reunion Channeled Force Demand Answers Devastating Dreams Dusk Mangler Electric Revelation Final Strike Firestorm Grab the Prize Honor the God-Pharaoh Insidious Dreams Kaervek's Spite Katara, Seeking Revenge Knife Trick Laughing Mad Lesser Masticore Lightning Axe Magmatic Insight Mardu Outrider Minion Missile Monastery Siege Nahiri's Wrath Natural Order Necrologia Nostalgic Dreams Pirate's Pillage Probe Pumpkin Bombardment Quarrel's End Restless Dreams Ruthless Disposal Sazacap's Brew Scorched Earth Seize the Spoils Sickening Dreams Sonic Burst Sonic Seizure Souls of the Lost Sparkhunter Masticore Surge of Strength Thrill of Possibility Thrill-Kill Disciple Timeline Inquiry Titania, Rugged Rumbler Tormenting Voice Turbulent Dreams Unexpected Windfall Vengeful Dreams Waste Away Wild Guess ther Tide
Given that Commander cares about the distribution of counters, its easy to see why the artifact is in demand
Number 92 Language English Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Standard, Timeless, Vintage Not Legal Formats Alchemy, Pauper Rulings (2/2/2024) If you target a creature or planeswalker with ward, you may still pay the ward cost, but Long Goodbye won't be countered even if you don't.