Archfiend of Despair - $47 Only ever printed in Battlebond prior to Commander Masters, this giant demon boy was getting seriously pricey
We can quickly fill our graveyard with any of blues looting spells, like Ideas Unbound and Frantic Search, then make Rex unblockable with whites protection spells and blues unblockable cantrips
If the target creature or enchantment is an illegal target as Withering Torment tries to resolve, it won't resolve and none of its effects will happen
Equipment commanders without white are always dicey because they miss out on the best support cards, but Gilgamesh, Master-at-Arms provides a huge mana advantage between the free equipment and the free cost to equip to itself
The threat, however, comes when you start resolving enchantments and giving him auras to make him more powerful or harder to remove from the battlefield