Crystalis/Leaf

Leaf
The town of leaf is located outside of your cave.

After leaving the cave, you will discover that you are unarmed; asking around will give suggestions to speak with the elder, who will give you the Sword of Wind. You can now explore the wilderness, and take care of any monsters that try to attack.

On the left side of the first wilderness area, you will find a cave. The first wise man is located here, and he will give you the task to repair the windmill. To do so, you will need to obtain the alarm flute; if playing on the NES, it can be purchased from the store. On the GBC, it is within the right-most cave.

Look for the bridge and cross it. Enter the cave there to find the windmill operator. Wake him up with the alarm flute to get the windmill key, which can then be used to turn on the windmill. This will open a cave leading to ../Brynmaer/, but you should return to the elder to learn the Refresh spell.

Vampire cave
Enter the northern cave. After crossing the cave's bridge, head to the end of the corridor. When you get the Ball of Wind, you can head north to get Warp Boots.

Return to the previous corridor. Ignore the first stairs, then head north. You can break the wall here with the Ball of Wind. You can head left to get a medical herb, or right to fight the vampire, your first important enemy.

The vampire is a simple opponent. He will frequently teleport in and out of the area, and his ranged attack simply releases two small bats. When he is defeated, you can collect the Rabbit boots, which allow you to jump across areas.