What are the most rewarding hidden content in Little Alchemy 2?

In Little Alchemy 2, some of the most rewarding hidden content includes discovering rare or complex elements that require multiple steps or creative thinking. Here are some of the most satisfying hidden elements and how to achieve them:

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1. Life
- Why it's rewarding: Life is a foundational element that unlocks many other combinations, making it a key milestone in the game.
- How to make it:
1. Combine Water + Water to create a Puddle.
2. Combine Puddle + Water to create a Pond.
3. Combine Pond + Water to create a Lake.
4. Combine Lake + Water to create a Sea.
5. Combine Sea + Earth to create Primordial Soup.
6. Combine Primordial Soup + Energy to create Life.

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2. Human
- Why it's rewarding: Humans are central to many advanced combinations, and unlocking them opens up a wide range of possibilities.
- How to make it:
1. Create Life (see above).
2. Combine Life + Clay to create a Human.

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3. Unicorn
- Why it's rewarding: Unicorns are mythical and fun to discover, requiring a bit of creativity.
- How to make it:
1. Combine Horse + Rainbow to create a Unicorn.
- To make Horse: Combine Animal + Hay.
- To make Rainbow: Combine Rain + Sun.

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4. Time
- Why it's rewarding: Time is a crucial element for creating advanced items like clocks, calendars, and even the universe.
- How to make it:
1. Combine Sand + Glass to create a Hourglass.
2. Combine Hourglass + Life to create Time.

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5. Universe
- Why it's rewarding: The universe is one of the most complex and satisfying elements to create, representing the pinnacle of the game.
- How to make it:
1. Create Time (see above).
2. Combine Time + Space to create the Universe.
- To make Space: Combine Sky + Star.

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6. Phoenix
- Why it's rewarding: The phoenix is a mythical creature that requires a unique combination.
- How to make it:
1. Combine Fire + Bird to create a Phoenix.

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7. God
- Why it's rewarding: Creating a god is a fun and unexpected achievement.
- How to make it:
1. Combine Human + Immortality to create a God.
- To make Immortality: Combine Fountain of Youth + Human.
- To make Fountain of Youth: Combine Water + Spring.

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8. Corpse
- Why it's rewarding: While morbid, the corpse is a hidden element that leads to other interesting combinations.
- How to make it:
1. Combine Human + Time to create a Corpse.

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9. Zombie
- Why it's rewarding: Zombies are a fun and spooky addition to your collection.
- How to make it:
1. Combine Corpse + Life to create a Zombie.

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10. Alien
- Why it's rewarding: Aliens are a cool and unexpected element that adds a sci-fi twist.
- How to make it:
1. Combine Life + Galaxy to create an Alien.
- To make Galaxy: Combine Star + Star.

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Tips for Discovering Hidden Content:
- Experiment with everything: Try combining elements that seem unrelated. Sometimes the most unexpected combinations yield the best results.
- Use hints sparingly: If you're stuck, the game offers hints, but try to solve puzzles on your own for a more rewarding experience.
- Think outside the box: Some elements require abstract thinking, like combining Time + Life to create Death.

By following these steps and experimenting creatively, you'll uncover some of the most rewarding hidden content in Little Alchemy 2!