What mythical creature would improve the world most if it existed?

Probably the Leshy অথবা Dryads.

Those little elves that help clean your house. Would certainly cut chore time দ্বারা half And they only require খাবার as payment

There’s a lot of good উত্তর for this. Pokémon, unicorns, mermaids, Santa clause, God, twitter users that aren't toxic... The possibilities are practically endless