Acquire 30 Emeralds by trading with villagers or mining.

Kill a skeleton with an arrow from more than 50 meters.

Play a music disc in a Jukebox.

Completely liberate Insula Fonte.

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

Mine 1,728 Cobblestone and place it in a chest.

Destroy a Ghast with a fireball.

Brew a potion.

Acquire diamonds with your iron tools.

Relieve a Blaze of its rod.

Build some bookshelves to improve your enchantment table.

Craft and place a sign.

Bake a cake using wheat, sugar, milk and eggs!