dnd 5e – Can a monk use the Stunning Strike feature on an opportunity attack?

The description of the monk’s Stunning Strike class feature states:

When you hit with a melee weapon attack, you can spend 1 ki point to make the target stunned until the end of your next turn if it fails a CON saving throw.

An opportunity attack allows you to:

use your reaction to make one melee attack against the provoking creature.

Does an opportunity attack made with a melee weapon allow a monk to use Stunning Strike if the attack hits?

dnd 5e – Can a monk make a Stunning Strike on an Opportunity Attack?

The Monk Stunning Strike class feature states

When you hit with a melee weapon attack, you can spend 1 ki point to make the target stunned until the end of your next turn if it fails a CON saving throw.

Opportunity attacks allows you to

use your reaction to make one melee attack against the provoking creature.

Does an opportunity attack made with a melee weapon allow a monk to make their opportunity attack a stunning strike?

dnd 5e – Does an Echo Knight fighter’s echo provoke an opportunity attack when it moves?

Does an Echo Knight fighter’s echo provoke an opportunity attack when it moves?

The Echo Knight fighter’s Manifest Echo feature says, in part (EGtW, p. 183; emphasis mine):

At 3rd level, you can use a bonus action to magically manifest an echo of yourself in an unoccupied space you can see within 15 feet of you. This echo is a magical, translucent, gray image of you that lasts until it is destroyed, until you dismiss it as a bonus action, until you manifest another echo, or until you’re incapacitated.

Your echo has AC 14 + your proficiency bonus, 1 hit point, and immunity to all conditions. If it has to make a saving throw, it uses your saving throw bonus for the roll. It is the same size as you, and it occupies its space. On your turn, you can mentally command the echo to move up to 30 feet in any direction (no action required). If your echo is ever more than 30 feet from you at the end of your turn, it is destroyed.

The rules on opportunity attacks state (emphasis mine):

You can make an opportunity attack when a hostile creature that you can see moves out of your reach. To make the opportunity attack, you use your reaction to make one melee attack against the provoking creature. The attack occurs right before the creature leaves your reach.

The description of the Manifest Echo feature does not state that the echo is a creature, so am I correct to conclude that the echo wouldn’t trigger an opportunity attack?

dnd 5e – Can a Hydra make multiple opportunity attacks at once?

Let’s look at the opportunity attack rules:

[…]

You can make an opportunity attack when a hostile creature that you can see moves out of your reach. To make the opportunity attack, you use your reaction to make one melee attack against the provoking creature. The attack occurs right before the creature leaves your reach.

[…]

Suppose we remove the reaction cost.

You can make an opportunity attack when a hostile creature that you can see moves out of your reach. To make the opportunity attack, [SNIP] make one melee attack against the provoking creature. The attack occurs right before the creature leaves your reach.

You’ll note that this is very clear that you don’t get to make 1 million opportunity attacks when someone leaves your reach.

You can make an opportunity attack when the trigger occurs. It doesn’t say “you can make as many as you want”.

Adding a cost — an extra restriction — doesn’t suddenly make that paragraph let you make infinite opportunity attacks by paying the cost repeatedly. An extra restriction doesn’t remove other requirements.

So a Hydra can make one opportunity attack when provoked by someone leaving its reach. It costs one reaction. Unlike most creatures, it has multiple reactions, so can do this again later.

Weak support from a tweet:

Q: Mr. Crawford, I’m confused about Reactive Heads. If a player provokes an OA from a Hydra, can it atk them with every head?

A: A hydra can have more reactions than normal, but it doesn’t change how an opportunity attack works: one attack per opportunity attack.

This is weak, because you could read this as “one attack per opportunity attack, and you do 10 opportunity attacks to one opportunity attack trigger; see, no problem!”, but that would be an extremely strange way for Crawford to say it.

dnd 5e – Does an Echo provoke an opportunity attack when it moves?

The echo knight feature Manifest Echo says (emphasis mine):

At 3rd level, you can use a bonus action to magically manifest an echo of yourself in an unoccupied space you can see within 15 feet of you. This echo is a magical, translucent, gray image of you that lasts until it is destroyed, until you dismiss it as a bonus action, until you manifest another echo, or until you’re incapacitated.

Your echo has AC 14 + your proficiency bonus, 1 hit point, and immunity to all conditions. If it has to make a saving throw, it uses your saving throw bonus for the roll. It is the same size as you, and it occupies its space. On your turn, you can mentally command the echo to move up to 30 feet in any direction (no action required). If your echo is ever more than 30 feet from you at the end of your turn, it is destroyed.

Attack of Opportunity mentions (emphasis mine):

You can make an opportunity attack when a hostile creature that you can see moves out of your reach. To make the opportunity attack, you use your reaction to make one melee attack against the provoking creature. The attack occurs right before the creature leaves your reach.

The description does not state that the echo is a creature, so am I correct to conclude that the echo wouldn’t trigger an attack of opportunity?

dnd 5e – Do Animated Objects make Opportunity Attacks?

Yes, they can.

From the spell:

If you issue no commands, the creature only defends itself against hostile creatures. Once given an order, the creature continues to follow it until its task is complete.

If you order your animated objects to “Kill those orcs”, they will do everything they can to accomplish the task until it is complete without you expending another action (bonus or otherwise) to do it. This would include making Opportunity Attacks, because they are creatures, there is no text that says they don’t have a reaction, and an OA is triggered by the target moving out of a creatures reach.

On the other hand, if you only command them to “Attack this particular orc, this round”, they would perform that task and then wait for further instructions, possibly retaliating if attacked.

dnd 5e – Can an Echo Knight with the War Caster feat use spells in place of opportunity attacks made by their Echo?

As mentioned in the question, the Manifest Echo feature reads (emphasis mine):

When a creature that you can see within 5 feet of your echo moves at least 5 feet away from it, you can use your reaction to make an opportunity attack against that creature as if you were in the echo’s space.

Specifically, it says the opportunity attack is provoked from you, when moving away from your echo. Since the hostile creature’s movement provokes an opportunity attack from you, War Caster’s ability to cast a spell rather than make the opportunity attack does apply. However, as noted in V2Blast’s answer to this follow-up question, you are replacing the reaction of “make an opportunity attack against that creature as if you were in the echo’s space” with the reaction given by War Caster of “cast a spell at the creature”. The spell follows normal rules for spellcasting, including being cast from your own space.

This can still be useful, but perhaps not as you intend. Your booming blade example, for instance, would only work if the target provokes the opportunity attack from an echo’s space and they are also within booming blade range of the caster.

dnd 5e – Can a druid get out of wild shape to avoid an opportunity attack?

No

A character provokes an opportunity attack when he moves out of a hostile creature reach:

You can make an opportunity attack when a hostile creature that you can see moves out of your reach. phb pg. 195, emphasys mine.

And this same character can avoid the OA if he teleports, or someone or something moves him without his action/movement/reaction.

You can avoid provoking an opportunity attack by taking the Disengage
action. You also don’t provoke an opportunity attack when you teleport
or when someone or something moves you without using your movement,
action, or reaction. Ibidem

I would rule that, because shapeshift is an action, this action is the one that moves the character, and this action was made by the character, then the character can’t avoid the OA.

Keep in mind that this OA happens just when the character use his shapeshift action to get outside the hostile creatures reach. He can move freely after that, the enemy already used his reaction.

dnd 5e – Does Tremorsense allow Attacks of Opportunity while Blinded?

Nothing about tremorsense involves vision at all. Tremorsense specifically functions by sensing vibrations transmitted through the ground. Hence, the blinded condition would not have any effect on the ability of a creature to use or benefit from its tremorsense.

Ok, but what about attacks of opportunity?

The above answer is simple and straightforward, but unfortunately it doesn’t fully answer the question. The problem here is that the description of tremorsense doesn’t describe the degree to which the sense can substitute for vision in the first place. The only specific mechanical effect described is being able to pinpoint the location of any creature within range. Complicating matters is the fact that, as far as I can tell, all monsters with tremorsense also have darkvision with at least the same range, so cases where a monster can sense a creature with tremorsense and attack that creature without also being able to see it are vanishingly rare, at least until the PCs start pulling out blinding effects and force their DM to make a ruling.

So my recommendation for a DM is this: make a ruling on how tremorsense works in your game. There are 2 logical rulings that I can see based on the description:

  1. Tremorsense is effectively a substitute for vision for targets that it can detect.
  2. Tremorsense allows the monster to know the precise location of a source of vibrations and little else.

If you decide on the first ruling, then blindness, magical darkness, and any other effect that impedes vision have no detrimental effects on a creature with tremorsense, as long as the creature’s opponent is detectable via tremorsense (i.e. not ethereal, flying, etc.). With this ruling, a creature with tremorsense can make attacks of opportunity as normal even while blinded against targets it can detect with tremorsense. Or to put it another way, sensing a creature via tremorsense is mechanically equivalent to seeing it with normal vision.

If you decide on ruling 2, then a creature with tremorsense in blinding conditions suffers most of the normal detriments of blindness, including disadvantage on attacks, advantage on attacks against it, and being unable to make attacks of opportunity. The only exception is that blindness does not prevent a creature with tremorsense from knowing the location of detectable creatures. Hence, it would not be possible to hide from it (using the hide action), since it would still know your location (just like it would not be possible to hide from it by getting behind total cover).

Ultimately, I can think of reasonable arguments for both rulings, so I’m not going to recommend one over the other. However, I believe that ruling 1 is much more common in actual play, not least because it makes monsters with tremorsense more of a threat and makes them easier for the DM to manage in battle (one less source of advantage/disadvantage to keep track of).

dnd 5e – Does the bonus damage from Spirit Shroud apply to an Echo’s opportunity attacks?

The UA spell Spirit Shroud has the following effect:

Until the spell ends, any attack you make deals 1d8 extra damage when you hit a creature within 10 feet of you.

The Echo Knight has the following ability (emphasis mine):

When a creature that you can see within 5 feet of your echo moves at least 5 feet away from it, you can use your reaction to make an opportunity attack against that creature as if you were in the echo’s space.

Assuming that a creature triggers an opportunity attack from an Echo created by an Echo Knight Fighter under the effects of Spirit Shroud that is more than 10 feet away from the creature, would Spirit Shroud’s bonus damage apply to the attack?


My uncertainty stems mainly from the fact that it’s clear that normal attacks made by the Echo would not gain this bonus (if made from more than 10 feet away), as they simply originate from the Echo:

When you take the Attack action on your turn, any attack you make with that action can originate from your space or the echo’s space

The addition of “as if you were in the echo’s space” seems to imply that opportunity attacks for Echos work differently, however.