37
\$\begingroup\$

Warlocks can take the following invocation:

Repelling Blast

Prerequisite: eldritch blast cantrip

When you hit a creature with eldritch blast, you can push the creature up to 10 feet away from you in a straight line.

This could be read as "when you hit a creature with your eldritch blast cantrip", i.e. once per turn regardless of beams/damage, or "whenever a creature gets hit with one of your eldritch blasts", which might happen more than once per turn. Which is correct? Can a Level 5 Warlock push a single goblin back 20' per round if they hit twice? How about two goblins for 10' each?

\$\endgroup\$
43
\$\begingroup\$

The Repelling Blast Invocation applies to each hit

Since we know you can select the target of each separate Eldritch Blast ray separately , even to the extent that other Repelling Blasts could actually push the same creature out of range of the remaining subsequent beams, we must rule that Eldritch Blast (no matter what Invocation is attached to it) is a single spell that hits in sequence, not simultaneously as per Magic Missile.

This is further expanded upon when we look at Hex, which triggers each time an attack hits the Hex'd target.

So the only conclusion the sound logic and readings of these rules can give us is that Eldritch Blast, Scorching Ray, and similar spells that require multiple attack rolls to hit their target(s) are NOT simultaneous and always hit independently of each other, in succession, unless otherwise noted in the spell's description.

As you pointed out, the prerequisite for Repelling Blast is:

"...When you hit a creature with eldritch blast..."

Eldritch Blast requires you to determine if you hit or miss each target or targets for each beam (not once per spell), thus letting us know if the requirements 'when you hit' or met or not. Repelling Blast, and any other feature, trait, spell, or spell-like ability that activates when hit or attacked by something would trigger for each Eldritch Blast beam.

So yes, at 5th level with 2 beams you could push a single goblin up to 20ft away, or push 2 different goblins up to 10ft away from you in a straight line. You do not need a separate ruling for hitting the same creature with multiple beams, because your ruling is already included in the spells text.

\$\endgroup\$
  • \$\begingroup\$ In Xanathar's splat book, there are other invocations that affect enemy movement in a similar fashion. For example, Grasp of Hadar can pull an enemy 10ft closer to you in a straight line, but the entry specifies "once on each of your turn". Lance of Lethargy, which reduces the enemy's speed, has the same restriction. I was honestly expecting an errata for the PHB after that, but it never came. As far as I know, Repelling Blast is the only movement effect that potentially applies to every beam of Eldritch Blast. \$\endgroup\$ – Dungarth Jan 31 '18 at 20:19
  • \$\begingroup\$ I agree that, given the difference in wording in later similar abilities, Repelling Blast is probably supposed to work the same way (I actually house-rules that). But since no errata came out...who knows (maybe just because its the kind of rule-change that could upset people used to the way it works as opposed to just an accidental '+1' bonus being missed or whatever, and wasn't considered significant enough). \$\endgroup\$ – PJRZ Feb 28 at 10:35
8
\$\begingroup\$

Each ray Repels, but...

Creatures hit with multiple rays requires a ruling

Repelling Blast (Player's Handbook, 5th ed., p111)

When you hit a creature with eldritch blast, you can push the creature up to 10 feet away from you in a straight line.

Eldritch Blast (p237)

...The spell creates more than one beam when you reach higher levels: two beams at 5th level,three beams at 11th level ,and four beams at 17th level. You can direct the beams at the same target or at different ones. Make a separate attack roll for each beam.


Originally, I'd come to the conclusion that you can only affect a creature once per casting, by way of the Combining Magical Effects rules (p205). As both @DuctTapeAl and @J.A.Streich pointed out however, the Combining Effects rules are not germane to this question: it's one spell, and instantaneous. Discussion w/@SevenSidedDie underscored the 'when you hit a creature with eldritch blast' section.


This can be read two ways:

  1. Each ray hits separately, and damages separately, so the secondary effects are separate, and cumulative, too. Supporting this, Repelling blast merely says 'when you hit...'

  2. Alternately, each ray of an eldritch is part of the same eldritch blast. Though a creature is hit with two rays, it's being hit by both rays simultaneously; eldritch blast is an instantaneous effect. So the 'when' is happening at the same time and the caster only moves the creature up to 10' once.

    Under this reading, two or more creatures each hit by a ray from one EB would each have been hit by EB, each moving 10' as well.


@KorvinStarmast pointed up a tweet-ruling by Jeremy Crawford:

Yes, Repelling Blast can push a target out of the range of subsequent beams from eldritch blast.

Which is in answer to the question:

If you get 3 attacks with eldritch blast, can the first attack push a target out of range of the next two attacks?

This ruling shows that each Eldritch blast attack is independent and cumulative, as per the first option above.

\$\endgroup\$
8
\$\begingroup\$

Each blast takes an attack roll to hit. Per the Eldritch Blast description on p. 237 of the PHB:

You can direct the beams at the same target or at different ones. Make a separate attack roll for each beam.

This question only arose due to only looking at an individual target. If two rays had impacted two different targets, all of us would agree that both targets would be knocked back, correct? So if 2 blasts hit, each would knock back the selected target 10ft.

If they both hit the same target (still requiring 2 separate successful attack rolls), by the same logic as noted above, the target would get knocked back 10ft by one impact, and 10ft by the other. This is alluded to in the Repelling Blast invocation description on p. 111 of PHB:

When you hit a creature with eldritch blast...

[Bold emphasis is mine]

Therefore each blast, if it hits, and the Warlock in question is able to and wishes to use a Repelling Blast effect, would benefit from it.

\$\endgroup\$
0
\$\begingroup\$

Going to be the spoil sport to adjudicate, no, on the multiple Repelling Blasts. I use the Combining Magical Effects rule, PHB 206.

The result of multiple Repelling Blasts hitting a single target is that, even if 4 rays hit in sequence, the duration of the pushback is overlapping, therefore no further effect.

Combining Magical Effects
The effects of different spells add together while the durations of those spells overlap. The effects of the same spell cast multiple times don't combine, however. Instead, the most potent effect—such as the highest bonus—from those castings applies while their durations overlap. For example, if two clerics cast bless on the same target, that character gains the spell’s benefit only once; he or she doesn’t get to roll two bonus dice. (PHB, p. 205)

\$\endgroup\$
  • \$\begingroup\$ My core difficulty with this answer is the implication of this logic train making it impossible for the warlock to hit the same target twice with eldritch blast. Damage is also a magical effect. This line of reasoning would argue that if you hit with two of them you only do the higher damage. I don't think that's how cantrips work. I edited in quote blocks to make sure nobody mistakes the text you got from the book for your answer/reasoning. \$\endgroup\$ – KorvinStarmast Jan 31 '18 at 19:53
  • \$\begingroup\$ Welcome to RPG.SE. Please take the tour and visit the help center to get a feel for how this Q&A site works; it's not a discussion forum. Thanks for joining in, and please take a look at some of the other questions and answers in areas of interest. There's a lot of good expert advice to be found here. Once again, welcome, and happy gaming. \$\endgroup\$ – KorvinStarmast Jan 31 '18 at 19:56
  • 1
    \$\begingroup\$ PS, the lead dev did comment. He rolled up one answer to three related questions on the each EB pushing back 10' question here. \$\endgroup\$ – KorvinStarmast Jan 31 '18 at 20:02
  • \$\begingroup\$ Each beam hits separately for instantaneous damage. The pushback has a duration. To me, it's getting hit with one sledge hammer or three. Yes, you'll take the damage from three blows, but in real world physics would one be pushed back 30"? Knocked prone yes -- keep flying, no. But hey, this is fantasy where a charging tyranasaurus rex can be pushed aside by a second level warlock, right? ---in other words, a deeply flawed effect as written. \$\endgroup\$ – GS1969 Jan 31 '18 at 20:03
  • \$\begingroup\$ I think the invocation could have been more clearly worded, since cantrips were by design enabled to have multiple instances as one raised in character level. FWIW, Eldritch Blast and Firebolt are different. (both cantrips) forebolt just boosts the damage of a hit, EB spell text allows for separate attacks. That seems to have been deliberate, making this cantrip special. (FWIW, your ruling also makes sense, given the point about "instantaneous" for the spell duration). \$\endgroup\$ – KorvinStarmast Jan 31 '18 at 20:05
-1
\$\begingroup\$

Whether it's instant or consecutive doesn't matter. it's 1-4 individual beams with their own power each applying a move of 10 ft on hit. If you where hit by 4 wrecking balls at the same instant, each with enough force to push you X ft, you would move (X times 4) ft.

\$\endgroup\$
  • 2
    \$\begingroup\$ Welcome to the site. Please take the tour as it's a useful introduction to how things work around here. As a Q&A site we work a bit differently to forums. Are you able to edit in any information to better help support this answer? At the moment it's hard to tell whether this is based on rules (or some other credible source) analysis or if this is just your personal opinion of how things work. \$\endgroup\$ – Purple Monkey Jan 18 '17 at 12:19
  • 1
    \$\begingroup\$ Please provide sources/support for this answer. \$\endgroup\$ – KorvinStarmast Jan 18 '17 at 13:29
-4
\$\begingroup\$

Usually, should not

Repelling Blast (Player's Handbook, 5th ed., p111)

When you hit a creature with eldritch blast, you can push the creature up to 10 > feet away from you in a straight line.

During instant of "when" target can either be hit by eldritch blast (regardless of the number of hits, since eldritch blast rays all happen in same instant) or not.

If condition "hit" is satisfied during that instant "when" for that creature, you can choose to apply repelling blast effect to that creature.

Otherwise rule would, most likely, clearly state "whenever" or "every time".

\$\endgroup\$
  • 1
    \$\begingroup\$ How do you conclude eldritch blast rays all happen at once time? Only spell I'm aware of that functions like that is magic missile -- that's why you have to declare hit or miss up front. \$\endgroup\$ – RonLugge Sep 20 '16 at 16:13
  • \$\begingroup\$ I did not find any major changes for e5 for this situation (my playing experience is solely from 3.5 days), but it was commonly ruled as such: 1. Consecutive rolls are mechanic of playing the game (for this particular effect) - as seen by players 2. Eldritch blast is instant effect - as seen by the game world 3. Repelling blast applies to effect (its resolution) 4. For a single creature, instant effect resolves once. We might have been overcompensation for player creativity, but I think separating game play mechanics from game world is a reasonable thing to do. \$\endgroup\$ – Michael M Sep 21 '16 at 6:40
  • 1
    \$\begingroup\$ Previous edition rulings can be useful to consider the context of a spells intents, but they don't actually have any basis on 5e mechanics. (It's a new edition, with new rules, deliberately discarding most of the older rules). Magic Missiles explicitly states all it's effects hit simultaneously. If there was any such general ruling, it wouldn't need that, ergo each hit occurs consecutively. Second, the ability triggers on hit -- not per spell cast. "When cast" and "when hit" are two different trigger types. You get 1-4 attacks with EB, ergo you can hit between 1 and 4 times. \$\endgroup\$ – RonLugge Sep 22 '16 at 18:58
  • \$\begingroup\$ Then my answer is as good as "just let DM decide". It would still be reasonable for DM to rule it out. It may be entirely different in 5e, but otherwise within a single "instant" situation can change enough to, for example, force even consecutive rolls (for same instant effect) to be functionally different. It is a nightmare for DM, especially if players can start relying on it. \$\endgroup\$ – Michael M Sep 23 '16 at 8:01

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.