Workhorse is something that helps the set play well but isn't inherently exciting
The old black sword (called Sword of Yawgmoth) gave +2/+1 for 2 (this is back when artifact equipment worked just like creature enchantments)
Most players cottoned on to the synergy Cauldron Familiar has with Witchs Oven early on, and the two went on to define their very own deck type, the notorious, and aptly-named, Cat-Oven
5 Underworld Breach This relatively recently released card led to the creation of an entirely new combo deck in Vintage that goes by the same name
A 'power 5' themed deck could take a twist of just running creatures that meet that criteria, with cards like: Terastodon Archetype of Endurance Ruric Thar, the Unbowed Spearbreaker Behemoth 8 Arna Kennerud, Skycaptain Master At Arms The Human Knight Esper Arna Kennerud, Skycaptain is an absolute powerhouse that doesnt require any fancy combos or game changer cards, instead, you can just beat face with a very strong creature and a ton of auras and equipment