Become Shadow

You become a creature of undeath and shadow

Until the spell ends, your speed is doubled, you gain a +2 bonus to AC, you have advantage on Dexterity saving throws, and you gain an additional action on each of your turns. That action can be used only to take the Attack (one weapon attack only), Dash, Disengage, Hide, or Use an Object action.  Additionally, you may use the amulet as a weapon and roll two handed damage for one handed attacks.

When the spell ends you return to a random form and fall unconscious for 1 round (roll a d6).