Urza, Lord High Artificer turns a board of cheap artifacts into a mana engine and card advantage machine
(Ice Cage, Illusionary Servant, Serpent of the Endless Sea) Of these three, I'd argue that all but Illusionary Servant exist in similar design space to cards we submitted
MTG Wilds of Eldraine Fae Dominion Decklist Commander Tegwyll, Duke of Splendor Faeries might be tricky creatures by design, but Tegwyll offers some fairly straightforward buffs and value generation
and in Proliferate decks, it gets the party started
But where The Meathook Massacre really shines is later in the game when you can pay a bit of extra mana to destroy every creature on the board
Phyrexian Arena Phyrexian Arena is a Mono-Black Enchantment that draws a card at the beginning of your upkeep at the cost of one life