Relieve a Blaze of its rod.

Build some bookshelves to improve your enchantment table.

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

Play for 100 days.

Gain the trust of an Ocelot.

Create an Iron Golem.

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.

Wear a full suit of Iron armour.

Construct a Dispenser.

Smelt an iron ingot.