Minecraft

The way to do this achievement is NOT have the axolotl kill the enemy, if you kill a mob the axolotl is attacking you will gain a regeneration effect from the axolotl. You then have to kill another mob while that effect is active.

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items needed for this
tropical fish bucket
axolotl
sword
drowned zombie

If you are similar to me, having a step-by-step guide written out is helpful. SO here goes...

1. Get enough iron to make a bucket.
2. Capture a tropical fish in the bucket. Almost any type of fish swimming in a tropical reef should do.
3. Find an axolotl (there are various species of it, any will do) and swim close enough to them to feed them the tropical fish you captured in the bucket.

**This might be the most time consuming step. I found one in a single-source water flow in a "inland" cave system and a few out in an ocean biome but never saw them in a tropical reef or swamp like others have. So you may need to explore various water sources to find one.**

4. The axolotl should now be your "friend." Capture the axolotl in the bucket.
5. Find a couple of "Drowned." Hopefully in shallower water to avoid drowning yourself (if you don't have a potion of underwater breathing).
6. Release the axolotl from the bucket near the Drowned and it should attack it. Once it has done damage, defeat the first and then a second Drowned.
7. Achievement pop?

Hope that help with any of you that are struggling to get this.

Pretty simple to do, although finding an axolotl may prove to be difficult, once you find an axolotl, scoop it up in a bucket of water and bring it near a hostile mob, most preferably the drowned, dump the axolotl from the bucket near the mob and watch it defeat the mob

Tip: hit the mob a few times with a sword so the axolotl can take it down more easily

Caution: the mob can attack back and stun the axolotl for a few seconds (I think it’s only if the drowned has a trident) so make sure to assist

Update: the axolotl can be found in the lush swamp biome

Here's a video guide and a downloaded world for this achievement

Shouout to MCPandagamerz for the world!

World Download Link: https://www.dropbox.com/s/87kmbxju7lnkq6u/1.17%20achievement...

Video Guide:

Some people are having issues so I'll explain what worked for me cause even I had issues. For starters I dug a 5x5x5 hole and filled it with water. I eventually found 2 Axolotts in a swamp and place them in the hole. The top of the water wasn't perfect so it will keep everything within the hole. They don't seem to attack anything but drowned zombies. When a drowned hit an Axolott they lay on the ground and have an effect during this time now during this time you should kill the drown and it should give you a regen effect. Achievement unlocked hopefully.

Easy seed for this achievement:

89276354
Get starter chest. Get a few logs from nearby trees to make gear and crafting table.

Mine straight down at -18, 54 (X,Z) to enter axolotl cave. Fall entering cave roof wont really hurt you. Cave is not very deep in ground. I recommend setting level to easy but, keep an eye for hostile mobs. You can craft wood sword if want. I don't believe you can finish this achievement on peaceful because you must attack drowned.

Use plentiful iron in cave to make at least one bucket. I recommend two buckets. Optional: make iron sword and armor.

Use bucket to capture tropical fish in cave (I think there has to already be water in bucket). Sometimes hard to target fish to get in bucket. Use bucket to give axolotl tropical fish. Axolotl will be happy and tamed. Then use bucket with water on axolotl to keep axolotl in bucket for transport to surface. I recommend getting 2 axolotl in buckets.

* Important: Return to surface using same hole you came into cave with (-18, 54) and go to river at:
-53, 54. You cannot get achievement in cave or on land.

Once in river release axolotl from bucket. Axolotl will swim around but stay around you and attack any drowned (underwater zombies). Keep an eye on your axolotl cause they may find drowned before you realize it. Axolotl will play dead if they take to much damage. Kill drowned and they come alive from playing dead.

Find drowned, allow axolotl to attack drowned. Finish killing the drowned and you will get regeneration effect from axolotl (will show on right side of screen). Continue killing drowned until achievement pops. For me it was just two drowned. Don't think regeneration effect has to still be active when killing drowned but you do have to at least get effect. Effect only lasts a few seconds. Most important thing is that you are all submerged in water and attacking drowned. Axolotl do not work on land.

Good luck!