Aquamarine Water Ring

This ring's gem was made from the core of a deadly water elemental.

While attuned to this ring, you have advantage on attack rolls against water elementals, and they have disadvantage on attack rolls against you. You can also cast Shape Water and Ice Knife at will.

The ring has 9 charges. It regains 1d8 + 1 expended charges daily at dawn.  If you expend the last charge, roll a d20. On a 1, the ring grows dry, crumbles to sand, and is destroyed.

Spells cast from the ring have your spell save DC.

As an action you can touch the ring to perform one of the following:

• You can expend 1 charge to gain swimming speed equal to your walking speed for 1 hour
• You can expend 1 charge to gain the ability to walk on water for 10 min
• You can expend 2 charge to gain the ability to breathe underwater for 1 hour
• You can expend 2 charge to gain use of the cantrip Ice Knife as a bonus action for 1 min

Additionally:

You can cast the following spells from the ring, expending the necessary number of charges:  
Create or Destroy Water (2 charge)
Watery Sphere (2 charges)
Wall of Water(3 charges)
Wall of Ice (3 charges)
Ice Storm (4 charges)
Control Water (5 charges)

Notes: Set: Innate Speed (Swimming), Walk on Liquid Surfaces, Breathe Underwater, Control, Buff, Movement, Jewelry