Yari of Air

A 6-foot-long shaft formed of air springs forth from your hands. You wield this shaft as if it were a yari (shortspear). Attacks with the yari of air are regular melee attacks. The yari deals 1d8 points of damage +1 point per two caster levels (maximum +10). The yari is considered a +1 weapon for purposes of overcoming damage reduction.
 

You form a slender, 6-foot-long yari composed of condensed air in your hands. This magic spear lasts until the spell ends. It deals 1d8 piercing damage on a hit, has the Thrown (20/60) and Reach properties, and counts as a +1 magic weapon, gaining the normal bonuses to attack and damage rolls.   If you drop or throw the yari, it dissolves into harmless air. While the spell persists, you can use a bonus action to reform the yari in your hand, causing the previous shaft of air to dissipate.   Special: Ryushin Clerics ignore the Rare tag of this spell.   At Higher Levels. When you cast this spell using a higher level spell slot, increase the damage by 1d8 for every two slot levels above its base level.