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

Use the Totem of Undying to cheat death.

Acquire 30 Emeralds by trading with villagers or mining.

Give someone a suspicious stew. [Bedrock Only]

Deal nine hearts of damage in a single hit.

Dry a Sponge in a Furnace.

Stay underwater for 2 minutes.

Visit all Ocean Biomes.

Use a Grindstone to get experience from an enchanted item.

Use a saddle to ride a pig, then have the pig get hurt from fall damage while riding it.

Defeat a Ravager.

Eat a Notch Apple.