Structures from the Past Add-on 26.30+

The world of Minecraft will be enriched with ancient ruins, temples, pyramids, and dungeons, among which you can discover 127 different structures with the mod Structures from the Past. The add-on also adds Mummies, Skeleton Knights, and other enemies with different gear and effects. You will have to explore dungeons with spawners and treasure, and defeating the Ancient Emerald Warrior will grant you a unique sword and armor.

Mobs

Mummy - lives in deserts and becomes more active at night

Ancient Mummy - a stronger and rarer version of the Mummy

Skeleton Knight - a skeleton with a sword and equipment

Withered Knight - armed with a sword and inflicts Weakness

Swamp Knight - attacks with a sword and inflicts Poison

Snow Knight - armed with a sword and inflicts Slowness

Ancient Emerald Warrior - an enlarged and empowered version of the Withered Knight (boss)

Emerald Gear

Can only be obtained after defeating the boss

Ancient Emerald Sword

Ancient Emerald Armor