A Little Darkness

1. Bottles of Experience added.
        1.1. Bottle of Knowledge gives 500 experience.
            1.1.1. Can be obtained as a reward for reaching world level 10.
            1.1.2. Can be obtained with a successful sacrifice of experience I with a 5% chance.
        1.2. Bottle of Wisdom gives 1000 experience.
            1.2.1. Can be obtained as a reward for reaching world level 25.
            1.2.2. Can be obtained with a successful sacrifice of experience II with a 5% chance.
        1.3. Bottle of Enlightenment gives 2500 experience.
            1.3.1. Can be obtained as a reward for reaching world level 50.
            1.3.2. Can be obtained with a successful sacrifice of experience III with a 5% chance.
        1.4. Bottle of Genius gives 5000 experience.
            1.4.1. Can be obtained as a reward for reaching world level 75.
            1.4.2. Can be obtained with a successful sacrifice of experience IV with a 5% chance.
        1.5. Bottle of Complete Knowledge gives 10000 experience.
            1.5.1. Can be obtained as a reward for reaching world level 100.
    2.    The first 7 achievements have been added.
        2.1. First look into the darkness — Find the Cursed Land.
        2.2. First step into the darkness — Obtain the Cursed Tree.
        2.3. The world is becoming more dangerous — Reach World Level 10.
        2.4. Tempered — Reach World Level 25.
        2.5. Veteran — Reach World Level 50.
        2.6. Master — Reach World Level 75.
        2.7. Lord of the world — Reach World Level 100.
    3. Steel Sword added.
    4. Smoldering Blade added.
        4.1. It's more powerful version of Steel Sword.
        5.2. Sets an enemy on fire on 3 seconds when attacking.
    5. Recipe of Silver Sword added.