Marrow-Gnawer If there's one thing Commander players love, it's goofy little Creature types, and nowhere is this more apparent than with the prevalence of Rat decks
Embereth Shieldbreaker hits Golden Egg or Guild Globe most often, which can be enough when theyre trying to set up a good Doom Foretold
Tinybones can even convert discarding effects into damage, toting an activated ability that causes each opponent with no cards in their hand to lose ten life for six mana
that you can get bonuses aplenty for artifacts you would just play anyway is just gravy
Anything from MTGs oldest sets will have a massive premium on them due to scarcity and collectability
Oblivion Ring on Lorwyn wasn't enough, and little by little, other cards were released in later sets to effectively tame Planeswalkers outside combat, culminating in Hero's Downfall on Theros