Rare Wondrous Item (Bottle)

This bottle has 8 charges. While holding it, you can use your action to expend a number of charges to create one of the following effects:

• Lightning Strike (3 or 5 Charges) It can be used as an action to hit a creature within 60 feet with a lightning bolt. The target must make a DC 15 Dexterity Saving throw, taking 6d6 lightning damage on a failure, and half as much on a success. Expending 5 charges instead of 3 increases the DC by 3 and the damage by 3d6. 
• Blitzkrieg (1 or 3 Charges). You grant a creature within 60 feet of you 10 extra ft. of movement speed for 1 minute. If you expend 3 charges instead of 1, the bonus increases to 20 ft.
• Rider on the Storm (4 Charges). You cast the Thunder Step (DC 15) spell using the item.
• Wind in our Back (1 Charge). You target a ship within 300 ft. and its speed is doubled for 24 hours. 
• Release the Thunder. You spend all charges to release a thunderstorm of appropriate strength, this thunderstorm cannot be consumed by the bottle again.

If the bottle is empty and opened in a natural (non-magical) thunderstorm, it consumes the thunderstorm and gains 1-8 charges, based on the magnitude of the storm, where 1 is a mild harmless storm, and 8 is an enormous storm capable of flooding rivers and massively  damaging cities and land.