Amulet of the Four Winds

This strange amulet in the shape of a wind blow retains the magic of the elemental plane of air. When attuned with it, it grants +2 in attack rolls based on Dexterity and you can read and write Auran, it also has 10 charges,  regaining 1d8 + 2 of them at dawn. You can expend 2 charges to involve your melee attack with a powerful swirling air around it causing 1d10 blugeoning damage and pushing the enemy away 10ft.

Spells: You can use the amulet charges to cast the following spells

• Control Winds(3 charges)
• Investiture of Air(4 charges)

Amulet Properties: while attuned to it you can as an action 

• Summon a air elemental at your command, you can't use this propertie until next day
• Create a air blast dealing 3d10 blugeoning damage to every creature in 30ft. except for you
• Create a air sphere to protect you from outer hazards(it works as a Leomund's tiny hut(3 charges))