Metabot's Manual of Magical Maneuvers

Acidwrought Glaive

4-level Evocation

You slam your hands into the ground, and draw out a demonic emerald blade. The weapon is similar in size and shape as a glaive, which lasts for the duration. If you let go of the blade, it disappears, but you can evoke the blade again as a bonus action.
While you are wielding this weapon with both hands, you can use your action to make a melee spell attack at a creature in range, dealing 2d10 acid damage on a hit. On a hit, you can choose a different creature within 5 feet of the original target and within range and repeat this attack against that creature using your bonus action.
Alternatively, you can use your action to end the spell, and make an attack roll on each creature within reach, dealing 6d10 damage on a hit.
At higher levels: When you cast this spell using a spell slot of 5th level or higher, the damage the spell deals increases by 1d10 for each slot level above the fourth.