Astin's Crowd Displeaser

You conjure a fey guitar in your hands. The guitar is a simple melee weapon with which you are proficient. It has the two-handed property. You can use your spellcasting ability instead of Strength for the attack and damage rolls of melee attacks made with it. On a hit, the target takes 2d4 bludgeoning damage. The guitar counts as magical for the purposes of overcoming resistance and immunity to nonmagical attacks and damage.

The guitar disappears if it leaves your hands, if you cast this spell again, or when the spell ends.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d4 for each slot level above 1st.