You evoke a seething blade of undulating primordial chaos in your hand. This magic sword lasts until the spell ends. It counts as a simple melee weapon with which you are proficient. It deals 2d8 + 1d6 damage on a hit and has the finesse, light, and thrown properties (range 20/60). If you drop the weapon or throw it, it dissipates at the end of the turn. Thereafter, while the spell persists, you can use a bonus action to cause the sword to reappear in your hand. When you hit with this magic sword and roll damage, choose one of the d8s. The number rolled on that die determines the blade's damage type: Acid (1), Cold (2), Fire (3), Force (4), Lightning (5), Poison (6), Psychic (7), Thunder (8). The blade's damage type remains the same until the start of your next turn.