You summon an aspect of a spiritual being, which envelops and shifts around you. When you cast the spell, choose one of the following options. Until you choose another or the spell ends, you gain the listed ability. You may choose to change the selected option as a bonus action on any of your subsequent turns.   Grand Arms: Your reach becomes 20ft, your unarmed attacks are considered magical, and you deal an additional 3d6 force damage.   Grand Wings: You gain a fly speed equal to your movement speed +20. You cannot maintain your flight and fall at the end of your turn.   Grand Tail: You can swing a spectral tail, knocking back any creature an amount of feet equal to 5 + your spell attack bonus (rounded down to the nearest five).