Hello there, here are the links and the details about how to build a simpler variation of the Trog Spawner depicted here:
https://youtu.be/tboAF3_ir34

Captain Bunneee was so amazing to dedicate an entire livestream of his to the building of this spawner:
https://youtu.be/z9E5yX-39M4

Captain Bunneee did a great job building it, it's pretty much flawless, and the minor things I would remark are actually going to be clarifications all along these instructions, thanks a lot Captain, seeing you building it helped me a lot!


First of all, in order to have the spawner working properly it needs to be correctly aligned to the game's chunks, and the first cornerstone helps you achieving exactly that.

Refer to this screenshot to understand how each part should be placed:
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1267980912

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1267982010
The above Startup Guide must be placed exactly at the South West corner of a claim over the ocean, at surface level (replacing one water block) and it must head East (the first image above should help you fully understanding that).

The cornerstone goes directly into the water, where Captain Bunneee placed the stone slab. This will ensure that the platform will be slightly closer to the water and it will be easier to place ladders.

In fact, keep some ladders handy and stick them to the side of a platform if you happen to fall down while building it, they will not interfere with your build.

If you're a PRO player and you want to take off from water just swim forward aiming slightly higher than the horizon line and spam the G key :P

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1267983516
Once you've built the guide place cornerstone #2 on the Stone block at its end, this cornerstone heads North.

This Section contains both the TPs that compose the trap. Do not delay the placement of these TPs or of the corrupted water, do this straight away in section #2, so that any Trog that spawns will go directly into the trap. Also, do not be afraid of corrupted water spilling out, it will not, you'll be able to place the Iron Bars safely around it.

If you're on normal gravity world you may find yourself stuck in places that have a 3 blocks tall jump that you can't normally perform. In such a case you can either glide (if you're pro) or you can temporarily put a block at your feet to jump up, or you can remove the top blocks and reduce the jump to 2 blocks, for filling it back when you're on the other side.

If you're on a hostile mobs world you may want to build this spawner during the night, or simply push mobs into the water until you have it completed - when it's done, the Red Wood Walls platform in the middle will be a safe place, assuming you don't get too close to the trogs in the trap :P

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1267985002
Cornerstone #3 again goes on a Stone block, this time it's on the East end of section #2, and must be placed heading East.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1267986092
Cornerstone #4 goes on the Stone block North of section #2, heading North

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1267987612
Finally, cornerstone #5 goes on the East Stone block of section 4, heading East.

If you did everything correctly you should have put only ONE Cactus block, cause all sections overlap of a single plane of blocks (exception made for the Startup Guide cornerstone, of course). Since the last 4 cornserstones overlap, if you simply sum the blocks required by the blueprints you may end up with slightly more blocks than necessary for the build. That's not a big deal, cause it's just a few canyon blocks, some Red Wood Walls, a handful of Cactus blocks and just 2 Iron Bars.

Once you're done building everything you can add ladders from platforms down to the water (you can do this also during the building phase), to ease getting back on the spawner in case you fall down, and you should also remove all the narrow Red Wood Wall blocks passages ending in a Stone block to avoid mobs jumping on them instead of heading towards the trap.

Hope the above will work flawlessly for anyone building it, and feel free to ping me if you want me to come to your world and make sure you place it correctly, cause placing it wrong may reduce the spawn rate or completely stop Trogs from spawning at all.

As requested by samson7770, I've added a new BP for the counting variation:
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1395182889
In order to simplify its construction (and because the version I depicted in the video had a different approach for the passages connecting platforms) I've built this on a fresh build of the published spawner.

Remove the teleporters and the trap from the existing central Red Wood Walls platform and place the new cornerstone against the middle of the 2-blocks-wide passage (so that the new platform will match with the old one, see screenshots in the BP page) then start building it. You'll just need a few wooden fences, one wooden fence gate, one sensor, one switch and one arc sign in addition to the teleporters and the trap you just dismantled.

Trogs prefer early morning to spawn, about from 6 to 11 AM, so the best way to get a lot of trogs is to simply stay there in the middle of the Red Wood Walls platform and sleep to get early morning, then wait about 5 minutes for the wave of spawns to stop and sleep twice again to trigger a new wave of spawns. If you cannot change the time of day (most likely if you're on a populated server with lots of people around) then the best option is to leave the area completely (teleport away) and do something else somewhere else, then teleport back to the spawner: I've seen trogs spawning at any time of day, even in the late afternoon, the only important thing seems to be that you give the game some time to unload that area and force a full reloading of it when you come back.