[MC-169167] Slimes, magma cubes, pufferfish, and ender dragons can consume the durability of shields within seconds

The Bug:

Slimes, magma cubes, pufferfish, and ender dragons can consume the durability of shields within seconds.

This most likely has something to do with how these mobs have little to no attack cooldown.

Steps to Reproduce:

Summon a large slime by using the command provided below.

/summon minecraft:slime ~ ~ ~ {Size:4,Attributes:[{Base:0.0d,Name:"minecraft:generic.movement_speed"}]}

Switch into survival mode, obtain a shield, start blocking with it, and slowly approach the slime.
Wait for it to begin attacking you.
Look at the durability of your shield closely.
Take note as to whether or not slimes, magma cubes, pufferfish, and ender dragons can consume the durability of shields within seconds.

Observed Behavior:

Slimes, magma cubes, pufferfish, and ender dragons can consume the durability of shields within seconds.

Expected Behavior:

Slimes, magma cubes, pufferfish, and ender dragons would not be able to consume the durability of shields within seconds.

Linked issues

is duplicated by 14

MC-151359 Slime attack too quickly, breaking shields in seconds Resolved

MC-199213 Shield gets spammed hit when defending against magma cube Resolved

MC-208462 Magma Cube hitting sheild 50+ times in 1 sec Resolved

MC-210306 Slimes instantly break shields Resolved

MC-215718 shields break very fast whehn blocking slimes Resolved

9 more links

relates to 3

MC-266584 Slimes, magma cubes and pufferfish attack while the game is frozen Open

MC-108937 Attack ranges for certain mobs are incorrect Resolved

MCPE-119451 Slimes, magma cubes, and ender dragons can attack quickly, using up a shield's durability in seconds Resolved

Attachments

MC-169167.mp4

Comments 20

Oval 2020-01-26T13:26:52Z

Duplicate of MC-151359

NeunEinser 2020-01-26T13:39:00Z

Using this ticket as parent instead.

gaspoweredpick 2020-04-26T00:08:06Z

This can be a problem when defending against magma cubes in basalt deltas. This problem is worse with MC-147694, as magma cubes don't get repelled, and continue to disintegrate the shield.

LaserSlimeHD 2020-08-03T19:39:46Z

The loud sound scared me so much ._.

gaspoweredpick 2020-08-03T23:51:24Z

Confirmed for ender dragons. When flying into your shield, they damage the shield way too much.

10 more comments

Avoma 2021-01-27T11:42:40Z

Can confirm in 21w03a.

Avoma 2021-02-13T20:13:20Z

Can confirm in 21w06a.

Avoma 2021-04-05T09:32:49Z

Can confirm in 21w13a.

ampolive 2021-06-16T21:34:25Z

In 1.17 per MC-229302.

ampolive 2021-07-04T21:22:57Z

Can confirm in 1.17.1 Release Candidate 1.

Avoma 2021-08-17T18:52:46Z

I'd like to request ownership of this ticket since the current reporter has been inactive for over a year. I'm willing to keep this ticket updated and will continue to provide all of the necessary details.

ampolive 2021-09-25T11:40:16Z

Can confirm in 21w38a.

xXFoxGamesXx 2022-12-01T20:13:13Z

Can Confirm in 1.19.2

Avoma 2022-12-01T20:23:42Z

@unknown, 1.19.2 has already been marked as an affected version. 🙂

Th3Scribble 2023-07-24T10:03:49Z

It's worth noting that the steps to reproduce call for summoning a size 5 slime (the NBT value counts from 0, so 4 really means 5), which never appears in game. Only sizes 1, 2, and 4 occur naturally. However, the glitch still occurs with size 4 slimes. Strangely, size 2 slimes don't damage shields at all.

syarumi 2023-08-30T15:44:24Z

This also affects pufferfish.

Viradex 2024-05-16T21:44:07Z

Can confirm in 24w20a

Libreh 2024-06-16T11:16:15Z

Can confirm in 1.21.

SeaOfPixels 2025-01-30T15:02:58Z

This report may be benefited from being renamed to "Slimes, magma cubes, pufferfish, and ender dragons have no attacking delay, quickly draining the durability of shields", to clarify why this issue happens and how it would be fixed (giving these mobs appropriate delays between attacks like other mobs).

insane96mcp 2025-02-22T10:05:13Z

Ender dragon has a 2 tick cooldown on attack (checks when was the last time the entity was hit) but only for wings. Head attack has no cooldown so you (well, your shield) take damage 20 times / sec.

This can be easily fixed.
Minecraft 1.20.1 using Parchment mappings.

private void knockBack(List<Entity> pEntities) {
   double d0 = (this.body.getBoundingBox().minX + this.body.getBoundingBox().maxX) / 2.0D;
   double d1 = (this.body.getBoundingBox().minZ + this.body.getBoundingBox().maxZ) / 2.0D;

   for(Entity entity : pEntities) {
      if (entity instanceof LivingEntity) {
         double d2 = entity.getX() - d0;
         double d3 = entity.getZ() - d1;
         double d4 = Math.max(d2 * d2 + d3 * d3, 0.1D);
         entity.push(d2 / d4 * 4.0D, (double)0.2F, d3 / d4 * 4.0D);
         // if (!this.phaseManager.getCurrentPhase().isSitting() && ((LivingEntity)entity).getLastHurtByMobTimestamp() < entity.tickCount - 2) { original check
         if (!this.phaseManager.getCurrentPhase().isSitting() && (((LivingEntity)entity).getLastHurtByMobTimestamp() < entity.tickCount - 10 || ((LivingEntity)entity).getLastHurtByMob() != this)) {
            entity.hurt(this.damageSources().mobAttack(this), 5.0F);
            this.doEnchantDamageEffects(this, entity);
         }
      }
   }

}

As for the head damage, a new conditions must be added like the one above

private void hurt(List<Entity> pEntities) {
   for(Entity entity : pEntities) {
      // if (entity instanceof LivingEntity) { original
      if (entity instanceof LivingEntity  && (((LivingEntity)entity).getLastHurtByMobTimestamp() < entity.tickCount - 10 || ((LivingEntity)entity).getLastHurtByMob() != this)) {
         entity.hurt(this.damageSources().mobAttack(this), 10.0F);
         this.doEnchantDamageEffects(this, entity);
      }
   }

}