Thorn Whip 5e [DnD Spell Rules + Tips]

Thorn Whip 5e

Thorn Whip is a staple cantrip of the Druid class, and one that players love to use. We’ll go over all the satisfying things you can pull off with Thorn Whip, as well as cover some of its thornier (heh) rules.

Who Can Cast Thorn Whip in 5e?

The following classes have Thorn Whip on their spell list:

• Druid

• Artificer (TCoE 12)

No subclasses get Thorn Whip for free.

What Does Thorn Whip Do in 5e?

Thorn Whip is a melee spell attack with a 30-foot range. Roll a d20, add your spellcasting modifier (Wisdom for Druid, Intelligence for Artificer), and hit if the result ties or beats the target’s AC.

Thorn Whip deals 1d6 magical piercing damage if it lands, and you have the option to pull the target up to 10 feet closer to you if it’s Large or smaller.

What Are the Rules for Thorn Whip in 5e?

The rules for Thorn Whip in DnD 5e are as follows:

• Thorn Whip is a melee spell attack. Even though the spell has a 30-foot range, it is treated as a melee spell attack.

• Pulling a creature with Thorn Whip does not make the target eligible for attacks of opportunity. That’s because you don’t provoke opportunity attacks “when someone or something moves you without using your movement” (PHB 195).

  Since Thorn Whip’s pull effect doesn’t involve the target using its movement, it’s not eligible for opportunity attacks.

• You can’t use Thorn Whip as an opportunity attack (normally). Because opportunity attacks “use your reaction to make one melee attack against the provoking creature” (PHB 195).

  The Sage Advice Compendium is more explicit that you can’t make an opportunity attack “if the spell attack is caused by casting a spell…the opportunity attack doesn’t suddenly give you the ability to cast a spell” (SAC 11).

  However, if you have the War Caster feat, then you can use Thorn Whip as an opportunity attack — but not at a 30-foot range; the normal rules of opportunity attacks (leaving your immediate 5-foot range) still apply (PHB 170).

• Thorn Whip causes damage (indirectly) to enemies that you pull through damaging terrain. Thorn Whip is forced movement, and while it might not make targets eligible for opportunity attacks, it can deal bonus damage in other ways.

  Most damaging terrain effects (Spike Growth, Wall of Fire, Create Bonfire, Moonbeam, regular ol’ fire/acid/lava, etc.) don’t specify that a target has to willingly enter the space in order to take damage; it’s just a space that deals damage to anyone who enters/exits/travels through (spell-dependent) takes damage.

• You can choose to not pull a creature you target with Thorn Whip. The wording of the spell is “pull the creature up to 10 feet closer to you,” so you can choose any number of feet you want to pull the creature from 0-10 feet.

• Thorn Whip can lift a target into the air — temporarily. If you’re above a creature and target it with Thorn Whip, it can certainly lift them 10 feet in the air, causing them to take an additional 1d6 fall damage.

  However, you cannot strangle a foe this way, nor can you sustain the lift, as Thorn Whip is in an instantaneous spell, and thus ends immediately upon doing what it does, on your turn.

• Thorn Whip is not affected by difficult terrain. While movement speed is cut in half in difficult terrain (PHB 183), forced movement is not movement. So you can still pull a target the full 10 feet toward you across difficult terrain (instead of being limited to just 5 feet).

• Thorn Whip can be used with the Mobile feat. The third bullet of the Mobile feat stops the targets of your melee attacks from being able to take opportunity attacks against you (PHB 168).

  Since Thorn Whip is a melee attack, it works with this part of the feat and prevents the target from making opportunity attacks against you for the rest of the turn (regardless of whether it lands).

• Thorn Whip can’t pull Huge or Gargantuan creatures. Only Large or smaller creatures can be pulled by the spell.

How Do I Use Thorn Whip in 5e?

Thorn Whip might seem fairly basic at first glance, but there are a whole bunch of ways to make it a real stand-out cantrip:

1. Pull creatures into damaging terrain, traps, persistent spell effects, etc. The most common applications of this are Create Bonfire (another cantrip, which deals 1d8 fire damage on a failed save when a creature moves onto it) and Spike Growth (a 2nd-level spell that deals 2d4 piercing damage to creatures who travel through spaces it affects).

   With a bit of set-up, these sorts of combos can make the (scaling) 1d6 piercing damage of Thorn Whip a whole lot more potent.

2. Pull your allies out of danger. One hidden benefit of Thorn Whip’s forced movement is that affected creatures don’t provoke opportunity attacks. At first, this might seem like a weakness, but it actually adds great utility to the spell.

   If your ally is willing to take some piercing damage, and you’re able to spend an action attacking them, this can be a great way to get your buddy out of a particularly bad situation. Especially if you pull them up 10 feet to a ledge or something.

3. Grab it as a Cleric to use with Spirit Guardians. If you’re willing to grab the Spell Sniper or Magic Initiate feat on a Cleric, choosing Thorn Whip can be a great option — especially since you’re already using Wisdom as your spellcasting ability modifier.

   Like Create Bonfire and Spike Growth, Spiritual Guardians deals damage to players who enter the space/start their turn on the space within their range.

4. Pair with Absorb Elements. If you really want to blow people up from a distance, Absorb Elements is a great way to add elemental damage to your next melee attack that lands — including melee spell attacks.

5. Protect your allies. Besides pulling your pal out of the fray opportunity attack-free, you can also go the more traditional route — pulling an enemy back toward you as they pursue an ally you’d like to protect. Great for helping to protect squishy NPCs.

Is Thorn Whip 5e a Good Spell?

Yes, Thorn Whip is a good spell. A scaling 1d6 damage on a 30-foot range melee attack cantrip that also offers reliable battlefield control is undoubtedly useful, especially when used in conjunction with persistent zone damage via a spell, trap, or otherwise damaging terrain.

Additionally, up to 10 feet of forced movement is pretty significant and remains relevant at higher levels. Especially when you’re pulling your mate out of danger without provoking an opportunity attack.

Thorn Whip 5e Compared to Shillelagh

Druids have a melee spell attack cantrip choice at level 1: the persistent Shillelagh that changes melee spell attacks to a Wisdom modifier and changes the damage die of the weapon to 1d8.

While Shillelagh deals 1 more average damage than Thorn Whip (4.5 vs. 3.5), Thorn Whip offers much more utility. And when paired with the right spells or other combinations, it even has the potential to outstrip Shillelagh in damage.

However, Shillelagh is a 1-minute, no concentration persistent effect that can be activated with a bonus action. That makes it much more efficient than Thorn Whip.

Overall, if you’re building around a Druid that likes to be in melee range anyway, Shillelagh is probably the better choice, whereas if you want to keep your distance and provide more utility, Thorn Whip is superior.

Thorn Whip 5e DM Tips

Some players will try to use Thorn Whip as a makeshift grappling hook. Sine grappling hooks are fairly cheap from the shop anyway, and a 10-foot grappling hook isn’t all that powerful, I say let them on.

Even though this really shouldn’t work RAW (the Thorn Whip disappears instantaneously, as per the spell’s casting time), it’s really not strong enough to worry about.

The other thing that players might try is turning the damage of Thorn Whip off when they use it to pull an ally out of danger without provoking opportunity attacks. Personally, I don’t allow this — part of the risk/reward of this application of Thorn Whip is deciding whether Thorn Whip’s damage is preferable to the enemy’s opportunity attack(s).

Removing this damage means that Thorn Whip is now a (fairly) consistent way of breaking a core game mechanic with no penalty. That’s just my way of looking at it though — if you disagree and want to let Thorn Whip have this additional modification, it’s not likely to cause any major negative effects.

Simple Thorn Whip 5e Spell Text