Sand Spirit

You have  a connection with sand in some way allowing you to control it and shape it. Wielding it  in a way allowing you to be crafty with your attacks and entrap your enemies. Most People like this are noticeable by the way they tend to carry sand with them, such as a large gourd they carry around filled with it or small bags lining there belt. 

Sand control

Level 1

You obtain a sand-holder. this can take whatever form you desire as long as it can realistically hold sand. it weighs 50-80 lbs.

At first level you obtain access to Control Water and Create or Destroy water, however instead of water they use, create, and destroy Sand. These do not count toward your spell's known or spell slots. You may use them a number of times equal to your Charisma modifier + proficiency bonus. Gain all uses back during a long rest. 

Sand tomb

Level 1

Once per long rest, as an action choose a target within 30ft that you can see. they must make a dexterity saving throw against your spell save dc or be grappled for as long as you maintain concentration. You may choose to end it by crushing them dealing 1d10 + your charisma modifier. If they are size small or below they take double what you roll. 

Sand-beast

Level 6

Once per long rest you may choose to become a Sand Monster. As a sand monster gain your level times 10 temporary hp. When this hp runs out you go back to normal and take 4d10 damage. You have +2 AC, and +2 to your strength modifier. your maximum strength goes from 20 to 25. gain +5 speed. You have 40 burrow speed.  You cannot cast any non-cantrip spells while in this form.

You gain the attacks
Claw) 1d10+Strength modifier slashing damage(light)
Bite)3d6+Str. or dex mod. peircing  (finesse)
Tail slam) 2d6+str or dex mod bludg. (reach, finesse) 
Devour) Target an enemy, if they have less HP than you make a contested strength saving throw against them. if you win they take 4d10 pierce damage. If they do not die they are grappled, every turn they are grappled they take 1d6 slashing damage. while grappled they may attack you, ignoring your temporary hp. 
Sandstorm) Choose an area within 15 ft. A sandstorm is created centered on that area, that is 10ft. by 10 ft. Every creature that starts or ends there turn in that area takes 1d4 slashing damage. The area remains as long as you wish and are in this form. 

Sand storm.

Level 14

Once per Long rest you may choose to create one of 3 storms within 40ft. of you. When in any of these storms you gain advantage on all attacks. all storms are considered difficult terrain for anything that's not you. 

Haboob
Create a giant sand storm that last for 30 seconds. The sand storm is in 30ft wide, 10 ft long, the dust storm faces toward you. Every creature that ends there turn in it takes 1d6 slashing damage, and is pushed 5 ft toward where you were when the storm was casted. Any creature in the Sand storm is blinded while in it.

Dust devil
create a 5ft by 5ft sand tornado, every creature within 10 ft. of it is pushed toward it at the end of there turn. A creature in it takes 1d10 slashing damage every turn, is blinded, deafened and grappled. If they are Tiny they are paralyzed instead. 

Quicksand
Crate a 10ft by 10ft area of quicksand, any creature that ends there turn in the quicksand must make a dexterity saving throw or be grappled. If they fail to escape on the turn after being grappled they are consumed by the sand and take 1d12 damage at the end of every turn. Creatures that are huge or bigger are not effected by this. 

Sand master

Level 18

Sand Tomb may be used an unlimited amount of times and every creature counts as size small while in it. Beast mode may be used a number of times equal to your proficiency bonus.  And you may use all 3 storms for sandstorm before requiring a long rest. 

You can use your sand to assist in your spells making all damaging spells deal 1d12 more damage, you may also create a sand shield as a bonus action gaining 1d12+your cha. modifer AC.  

Once per long rest you may choose to summon a Sand-beast without taking its form. It has the same attacks, and HP as if you took its form. you may command it as a bonus action or reaction.  Its stats are: 
Str)22 Dex)15  Con) 18 Wis)1 Int)1 Cha)1, AC)18, Speed)40ft walking, 50 burrowing,