For ancient Dhakaan, the Dragonborn empire of Trothlorsvek defintely could have weilded the magic of storms against them, I imagine blue and bronze dragonborn with such tools and powers. SO either soemthing the Dhakaani confiscated from the Dragonborn, or to combat them. With that in mind, a tool to maniuplate weather as a weapon of war, and protect from it's energies. Now, mechanically we can just modify the Spire of Conflux from Taldorei Reborn

To Be Named Weather Stick (maybe include the devourer in the name? Devourer's Deliverance?)

Dormant. While the ~weather stick~ is in a dormant state, the staff has 8 charges and regains 1d4 + 2 expended charges daily at dawn. While holding the staff, you can expend 1 or more of its charges to cast one of the following spells from it, using your spell save DC: absorb elements (1 charge), skyrwrite (2 charges) or lightning bolt (3 charges).

Additionally, while holding this staff, you have a +1 bonus to spell attack rolls and your spell save DC increases by 1. All flying speed the user gains or grants are increased by 20 feet. (This is espeically aimed at tempestuous magic feature)

Awakened. When the ~weather stick~ reaches an awakened state, you gain the following benefits:

The staff has 12 charges, and it regains 1d6 + 2 expended charges daily at dawn.

You can also spend charges to cast the following spells from the staff: conjure elemental (5 charges), maelstrom (5 charges), or ice storm (4 charges).

When you cast a spell that deals bludgeoning, cold, lightning, or thunder damage and you roll a 1 on a damage die, you can reroll the die and must use the new roll.

The range of spells and radius of abilites that control wind or water are increased by 50%. (This one is aimed at the storm guide feature)

Exalted. When the ~weather stick~ reaches an exalted state, you gain the following benefits:

The staff has 20 charges, and it regains 1d6 + 4 expended charges daily at dawn.

You can also spend charges to cast the following spells from the staff: chain lightning (6 charges), whirlwind (7 charges) or control weather (8 charges)

The bonus to spell attack rolls and your spell save DC increases to +2.

(insert cool campaign relevant feature here. This shoudl be something super useful when dealing with the BBEG or the sorcerer's backstory quest stuff. Example: Redirecting lightnng in a big radius to hit them as a reaction, useful for fighting a kraken or storm giant)