Dye your bed a different color.

Defeat an Elder Guardian.

Kill a Mob while wearing the same type of Mob Head.

Poison a Witch with a Splash Potion.

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

Dye all 4 unique pieces of Leather Armor.

Kill the Wither.

Enter an End Portal.

Using the Frost Walker boots, walk on at least 1 block on frozen water on a deep ocean.

Cure a zombie villager.

Play a music disc in a Jukebox.

Gather all 16 colours of wool.

Stop starvation using Rotten Flesh.