Construct a Nether Portal.

Travel by minecart to a point at least 500m in a single direction from where you started.

Dry a Sponge in a Furnace.

Catch and cook a fish!

Throw diamonds at another player.

Bounce 30 blocks upward off a Slime Block.

Kill the Wither.

Kill a mob next to a catalyst

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

Team up with an axolotl and win a fight

Defeat a Ravager.

Tame a Horse.

Acquire diamonds with your iron tools.