Brew a potion.

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

Deal 50 hearts of damage in a single hit using the Mace

Teleport over 100 meters from a single throw of an Ender Pearl.

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

Swim in lava while having the Fire Resistance effect.

Gather all 16 colours of wool.

Poison a Witch with a Splash Potion.

Throw diamonds at another player.

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

Create and fully power a Beacon.

Gain the trust of an Ocelot.

Kill a creeper with arrows.