If I took an acid vial and threw it at a monster that had a very small amount of health, killing it, would I still get the experience even though it was the acid vial that killed it?

I came across a small animal, and then a lot of small animals, and I started throwing acid potions at them. And then we all started thinking that
maybe I wouldn't gain XP from it because I didn't kill it - the acid did.

Would the same hold true if it were a larger animal?

Hypothetically, what if it were a giant dragon and I had hundreds of vials of acid that you somehow hit it with? Would I still get the XP for killing it that way?


2 Answers 2



Technically, according to Monster Manual p.9, "Challenge":

  • You gain XP for defeating the monster. There's no distinction here for weapon of choice. Throwing acid is just as legitimate as throwing daggers, say. Pushing the enemy into a conveniently placed vat of acid is equally valid. It's his own fault for building an uncovered vat of acid in his lair.
  • Monsters with a challenge rating of 0 are worth no XP if they have no effective attacks and pose no danger, but 10 XP if they do have effective attacks.

However, this particular question suggests you may have one of two particular exploits in mind, and I'd like to point out that both have been discussed before.

What if I tie a hundred vials together...

In Inventiveness vs. breaking the game; How do I encourage one, without enabling the other?, a player fills a net with hundreds of vials, ties it to a rope, and swings it at the enemy as an improvised melee weapon:

I thought the idea was impressive, and didn't think it would actually be a huge problem for an enemy... until it was. He ended up tossing something like 200 vials in the net, and managed to kill something a full 10 CR higher than the group, on his first turn.

This won't work in D&D 5th edition, because by the rules in the Player's Handbook you have to throw one vial at a time. There aren't any rules that say you can tie a hundred vials together and throw them with a single attack roll, and even if the DM lets you do that, there's no rule that says you can just multiply the damage value by the number of vials. A creature only has so much surface area.

Bear in mind that acid in D&D 5e is 25gp per vial. Suppose you want to kill a young red dragon, which has 178 hit points. On average, that's 26 vials of acid, or 650 gp worth at bare minimum. Even if you somehow threw them all at once and did 26 vials worth of damage, the dragon's AC is 18. You might miss. Did you being a backup sack of acid? You're spending maybe a quarter of the dragon's treasure hoard per attempt. The party needs to do a cost/benefit analysis up-front before attempting this.

Well of toads

The other fun exploit I remember from D&D third edition is the "well of toads". Buy enough toads to fill a well, throw them in, set the well on fire and claim the XP.

You can't do this in D&D 5e—not with toads, because they're 0 XP.

Technically, you can do it with lizards or weasels or something that has 2 hp and deals 1 damage per hit.

However, the DM shouldn't allow you to gain XP for defeating something that's not a challenge. Caged weasels can't harm you, but the real challenge might be getting them into the well. Uncaged weasels, if you have enough of them at a time to matter, would probably constitute a swarm of weasels, and that'd count as a single swarm creature, with a higher challenge rating, and a valid threat for XP purposes.


The acid is just a weapon, so the fact that it was the acid doesn’t change that it is your character’s victory over an opponent. Defeating an opponent using acid still counts as defeating them, which would normally earn XP.

However, they do need to be an opponent—a threat, an obstacle—to earn you XP. Killing a bunch of squirrels that aren’t an obstacle isn’t worth any XP.

For larger animals, it depends again on whether it’s an opponent, a threat, an obstacle. Cows are big but slaughtering a herd of cows won’t earn an adventurer any XP. Fighting an angry bull, that’s dangerous—and probably worth XP. Wolves aren’t big, but a pack of wolves hunting you in the woods at night is a threat and obstacle, making them an opponent that would earn XP by defeating.

It sounds like it was just a bunch of non-threatening animals. So no XP.

If you manage to defeat a dragon with just vials of acid, yes, that would probably be worth XP. Again, it being acid doesn’t change anything. If someone uses a sword, nobody says “the sword defeated the dragon, not you”. Same for acid: it counts if the opponent would count at all. Whatever tool used, whoever defeated the dragon earns XP.

  • \$\begingroup\$ Thank you for answering quickly \$\endgroup\$ Sep 29, 2019 at 6:01
  • \$\begingroup\$ @HoodedRogue I'll just add a scenario to help illustrate the answer. Imagine an archer shooting his arrow or a spearman throwing his spear at an opponent, will you still think it was the arrow or the spear that killed it or or the person that caused it? \$\endgroup\$ Sep 29, 2019 at 13:39

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