What spells/effects will cause a creature to “willingly move”

dnd-5eforced-movementmovementspells

As the title says, I'm looking for spells/effects that will cause creatures to move, like one of the effects from the Confusion spell. This is different than "forced movement" like a push/pull/teleport, in that the creature is using its own movement.

Ideally I could combo this with Booming Blade, so while the Command spell qualifies as making the target move, it won't do so if the command is "directly harmful to it". But whether or not it works with Booming Blade (or Opportunity Attacks), I'm still looking for these kinds of effects.

Best Answer

Two spells I have used to trigger opportunity attacks

fear
dissonant whispers

My warlock or bard, respectively, often casts one of those when one of my party members is in melee and if I am successful (the enemy fails the save DC) then my allies get an opportunity attack.

I have seen command used to this effect as you mention when another caster used that in a similar situation. (Confusion should also work, but I haven't seen it at the table). You could expect that the antipathy/sympathy spell to have similar effects.

From the 2019 Sage Advice Compendium (page 8)

Does Polearm Master let me make an opportunity attack against a target that is being forced to approach me?
A creature doesn’t provoke an opportunity attack if it is moved without the use of its movement, its action, or its reaction. For example, the effect of the antipathy/sympathy spell requires the target to use its movement, meaning that it would provoke opportunity attacks when it does so. Similarly, dissonant whispers requires the target to move using its reaction (if available), so that activity also provokes opportunity attacks. In contrast, a creature that’s pushed by a gust of wind spell does not provoke opportunity attacks.

Clerics and Paladins: turning enemies

A turned creature must spend its turns trying to move as far away from you as it can, and it can’t willingly end its move in a space within 30 feet of you. It also can’t take reactions.

Turn undead uses the foe's movement if they are undead; and against fiends, celestials, fey and elementals if the cleric is of the Arcana domain.

The Ancient Paladin's Turn the Faithless does something similar to fey and fiends.

Caveats: I don't self proc the effect, as you suggest. Depending on the version of booming blade that you are using (SCAG or Tasha's) there may be an issue with using the warcaster feat's feature to self proc the Opportunity Attack. When they changed the range to (self) it appears that the OA option using booming blade was curtailed, whereas the SCAG version was for normal melee range and worked with booming blade.

What is willing?

That's somewhat answered here, and it appears to have no consensus and attracts hair splitting. Discuss it with your DM/your table and come to a consensus that you all can agree upon.

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