[RPG] What spells can an Instrument of the Bards actually impose disadvantage on


In light of the revelation that an Instrument of the Bards requires a spell with a material component to be used, what spells can it actually be used on?

Best Answer

The November 2018 DMG errata replaces the last paragraph of the old description with:

You can play the instrument while casting a spell that causes any of its targets to be charmed on a failed saving throw, thereby imposing disadvantage on the save. This effect applies only if the spell has a somatic or a material component.

The means that a spell qualifies if all of the following conditions are met:

  1. The spell causes the Charmed condition

  2. The spell calls for a saving throw which, if failed, inflicts the charm effect

  3. The spell has a material and/or somatic component

The spells meeting these 3 conditions currently are:

  • Animal friendship

  • Charm monster

  • Charm person

  • Crown of madness

  • Dominate beast

  • Dominate monster

  • Dominate person

  • Hypnotic pattern

  • Modify memory