69 votes
Accepted

When can I make opportunity attacks?

Generally, only willingly moving out of an enemy's reach provokes opportunity attacks From the Basic Rules, p74: You can make an opportunity attack when a hostile creature that you can see moves out ...
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  • 53.8k
67 votes

Would there be balance issues if I allowed opportunity attacks against any creature, not just hostile ones?

From memory the War Caster feat is the only thing that might work well with this. Its third benefit is: "When a hostile creature's movement provokes an opportunity attack from you, you can use your ...
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66 votes
Accepted

Can I trigger an Opportunity Attack by forcing an opponent to move out of my reach?

Yes, but only if the ability forces the enemy to move out of reach using their movement, action, or reaction The rules state that only when the enemy uses their movement, action, or reaction to move ...
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  • 90.1k
65 votes
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Do rogues get sneak attack damage added to attacks made outside their turn?

Yes! The verbiage 1/turn definitely allows for the use of Sneak Attack out of turn for the rogue if they somehow get a reaction attack (either granted by an ally or by an opportunity attack). Note ...
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  • 102k
63 votes
Accepted

Can a monster with no melee attack make an Opportunity Attack?

Yes, but why it can isn't immediately obvious, though in the case of a Flameskull it's pretty impotent To make an opportunity attack the monster needs to be able to make a melee attack (PHB, p. 195): ...
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58 votes
Accepted

Do the Tunnel Fighter UA fighting style and the Polearm Master feat combine to grant indefinite opportunity attacks?

You are correct. Tunnel Fighter lets you make opportunity attacks for free, and Polearm Master lets you do so at a distance. An intelligent or reasonably aware force would have a good chance to ...
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57 votes
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How would combat work without opportunity attacks?

Coming from a D&D point of view... The game becomes a lot more mobile, speed is more valuable, the concept of front-liner diminishes, and being at range is either difficult or not important. I ...
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  • 44.1k
50 votes
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Does a reach weapon allow you to threaten squares 10 feet away or not?

Yes, reach also determines Opportunity attack range. Equipment Reach (p. 147). This property also determines your reach for opportunity attacks with a reach weapon. — PHB Errata ...
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49 votes
Accepted

Can you cast the Shield spell against an opportunity attack?

Reactions can be taken on your turn. A reaction is an instant response to a trigger of some kind, which can occur on your turn or on someone else's. PHB, pg.190 Therefore, yes, you can cast ...
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46 votes
Accepted

Do characters provoke opportunity attack when they leave another character's reach who is not facing them?

There are no facing rules in 5e by default. Thus one provokes an OA leaving an opponent's reach no matter how you imagine the characters are faced. The reasoning behind this is that the round ...
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  • 98.6k
43 votes

Does this lake event in the "Icewind Dale: Rime of the Frostmaiden" adventure allow a grapple as an opportunity attack?

These rules are for that encounter, not general. This is a great example of specific over general! The rules around that encounter for knuckleheads are specific and only relevant for that activity. ...
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  • 122k
41 votes
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Can you grapple a creature as an opportunity attack?

As Miniman's answer points out, you cannot grapple as an opportunity attack because an opportunity attack does not give you an Attack action. However, your situation doesn't actually call for an ...
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  • 4,631
41 votes

When you cast invisibility on your turn, and walk away from 2 enemies, do they get an attack of opportunity?

No, they don't get opportunity attacks. From PHB, page 195: You can make an opportunity attack when a hostile creature that you can see moves out of your reach.
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40 votes
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Can a Creature with Multiattack use it on an Opportunity Attack?

No, an opportunity attack is a single melee attack. From the Player's Basic Rules, page 74: To make the opportunity attack, you use your reaction to make one melee attack against the provoking ...
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  • 141k
39 votes

Can I circle around an opponent and avoid opportunity attacks?

Players Basic Rules, pg 71 Moving Around Other Creatures If you leave a hostile creature’s reach during your move, you provoke an opportunity attack, as explained later in the chapter. and, Players ...
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  • 8,352
39 votes
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How many Opportunity Attacks can a PC make during a round?

You only get ONE reaction between the start of your turn and the start of your next turn. An Opportunity Attack is considered a Reaction (PHB pp195) You can make an opportunity attack when a hostile ...
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  • 122k
37 votes
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Do I draw opportunity attacks when my mount uses flyby?

I would say no. The PHB on page 195 specifically states: you don't provoke attacks of opportunity when someone or something moves you without using your movement, action, or reaction. Under the ...
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  • 1,677
37 votes

When I walk towards an enemy and get within 10 feet, can I make an opportunity attack with Polearm Mastery and a reach weapon?

From the section on opportunity attacks: 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 ...
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35 votes
Accepted

Do opportunity attacks end the target's movement?

You are correct; movement may be resumed after an Attack of Opportunity. Movement is "spent" by the foot; as in, if a creature has a movement speed of "30ft", then they can spend that much speed ...
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  • 3,444
35 votes

Is there a way to leave melee combat without causing OA?

Disengage Disengage, as has been given in other answers, does allow you to use your action to move away without provoking an opportunity attack. If you take the Disengage action, your movement doesn'...
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35 votes
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Can a failed opportunity attack against a character protected by the sanctuary spell retarget someone else?

On a failed save, the creature must choose a new target or lose the attack or spell. (PHB 272) While it is not explicitly stated, it is a reasonable assumption you have to choose a valid target for ...
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  • 60.1k
35 votes
Accepted

Can you react to an opportunity attack?

The rules for reactions are fairly straightforward: Certain special abilities, spells, and situations allow you to take a special action called a reaction. A reaction is an instant response to a ...
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  • 35.4k
34 votes
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Will both Mage Slayer and Sentinel together reduce an enemy's speed to 0?

No, with a caveat. No, because Mage Slayer doesn't name this reaction an opportunity attack, so it doesn't count for triggering Sentinel. The caveat is that, well it sure looks like an opportunity ...
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34 votes

How many opportunity attacks can you make per turn before becoming exhausted?

Usually a creature has only a single opportunity attack available To make an opportunity attack a creature needs to use their reaction to do so. From the rules on opportunity attacks (emphasis mine): ...
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  • 35.8k
33 votes
Accepted

Does Sentinel's opportunity attack trigger when I shove someone?

No, you can't provoke opportunity attacks this way. From the Player's Basic Rules, page 74: You also don’t provoke an opportunity attack when you teleport or when someone or something moves you ...
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  • 141k
32 votes
Accepted

Can a druid get out of wild shape to avoid an opportunity attack?

This sounds like a clever way to avoid an Attack of Opportunity. The Druid is not moving, merely using a magical effect to take up less space. This is less "moving" than teleport, which expressly ...
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32 votes
Accepted

Is the spell from the third benefit of the War Caster feat still considered an opportunity attack for the Sentinel feat?

No, it's not an opportunity attack The relevant phrasing in the Sentinel feat (PHB, p. 169-170) is: When you hit a creature with an opportunity attack, the creature's speed becomes 0 for the rest of ...
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  • 7,513
31 votes
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Polearm master vs disengage

There is no Opportunity Attack The Polearm Master Feat is clear that the reactionary attack is an Opportunity Attack, and Disengage says that your movement doesn't cause Opportunity Attacks. In ...
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  • 28.1k
31 votes
Accepted

Do Animated Objects make Opportunity Attacks?

Yes, they can make opportunity attacks. From the description of the animate objects spell: You decide what action the creature will take and where it will move during its next turn, or you can issue ...
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  • 21.1k
31 votes
Accepted

Is the reaction from the third benefit of the Sentinel feat considered an opportunity attack?

No, it's not an opportunity attack. An opportunity attack is a specifically named game mechanic with specific rules set out for it (as found on page 195 of the PHB). If the third benefit of the ...
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