mtg ox cards // Human Soldier Double-Sided Token [Wilds of Eldraine Commander To discard your hand Ox tribal cards! : r/custommagic

Honorable Mention Necropotence For three black mana, Necropotence gives you access to more cards than just about any other permanent in the game

Sakashimas Protege Sakashima's Protege clones your opponents best creature with the double backup of cascade and having its own power and toughness (as opposed to typical Clones that die without something to copy)

#4 The One Ring (Showcase Scrolls) Set: Universes Beyond: The Lord of the Rings: Tales of Middle-earth Increase: +$37.69 Current Market Price: $247.07 Some version of The One Ring appears on this list basically every month as The Lord of the Rings: Tales of Middle-earth recedes further into the mythic past of 2023

For a more generic five-color enchantments deck we have other options too