The Carapace of Apratosh is a possibly-guaranteed artifact armor. The armor is quite powerful, blocking a significant amount of damage and increasing dodge by 10. It also contains the extremely useful evil and acid resistances, as well as two speed increase enchantments. While the the two enchantments are seperate, hovering of the tooltip of either shows that they both actually increase movement speed (it is not known if this is intended or a bug).
The combination of high damage reduction, high dodge increase, great resistances, and tons of movement speed increase makes this armor significantly better than anything that can be acquired in the early game.