Death Toll decklist for Duskmourn Commander Giving Deathtouch to Winter, Cynical Opportunist provides stability while you put together graveyard combos and take advantage of the MTG Delirium mechanic
Decks with mostly common and uncommon cards are far more accessible to new players, as rarer Wildcards are hard to come by
It reminds me of Wizards of the Coasts older Commander precons, which were often more like two or three half-decks in a trenchcoat (the idea being that players would play a few games, get a feel for which mechanics they liked and then start swapping in cards to emphasize that part of the deck)
In practice, Wrecking Ball Arm allows for any of your creatures to experience what it's like to be a Greater SandwurmGreater Sandwurm, which is powerful enough if you're equipping it to a legendary creature
Hobgoblin, Mantled Marauder Hobgoblin, Mantled Marauder proves that speed and discard triggers are a lethal combination