Harvest some leather.

Punch a tree until the block of wood pops out.

Build a tower of Scaffolding that reaches the maximum build height.

Use Riptide to give yourself a boost.

Use a Dried Kelp block as fuel in a furnace.

Using the Frost Walker boots, walk on at least 1 block on frozen water on a deep ocean.

Dye your bed a different color.

Poison a Witch with a Splash Potion.

Power a Furnace with Lava.

Dry a Sponge in a Furnace.

Collect Dragon's Breath in a Glass Bottle.

Spawn the Wither.