Here is the full list of all 21 White Lavender achievements.
Get pranked.
Find the purple ball.
Wear a hat that's way too big.
Collect 8 mug shards.
Reach 10 might.
Meet the mayor.
Explore all areas.
Defeat all boss enemies.
Collect all ingredients needed for the special tea.
Cure your sister.
Take Meggie to the end
Reach 10 witchcraft.
Reach 10 agility.
Wear sunglasses.
Collect all 3 holy scribbles.
Collect the pencil.
Cure your sister within 60 minutes.
Find the four-leaf clover.
Find the split pistachio helmet.
Wear all blue wizard items.
Find all kettles.