Kill the Enderdragon.

Use an Elytra to fly through a 1 by 1 gap while moving faster than 40 m/s.

Wear a full suit of Iron armour.

Activate a Conduit.

Collect any fish in a bucket.

Build a tower of Scaffolding that reaches the maximum build height.

Visit all Ocean Biomes.

Use a Grindstone to get experience from an enchanted item.

Buy one souvenir from the Gallery

Pick up all Jack o' Lanterns

Acquire each Hunter subclass.

Break 15 barrels in Rock Village.