her i explain how it works (principle) ask me if you have a question and i will try answer if i can 
yes works in 1.1 the Video was make in 1.9.3 but we get slower level now in 1.1 --- download world map --- save file vavo.dk the Blaze file in the top, next the Skeleton if you use any of my save files please tell me how it went thanks a sketch/blueprint from cxnull vavo.dk Notice that the spawner and place where skellies wind up are separated by 8 blocks, and also notice that the last block before their plummeting has no water on it Version for MP Server skeleton, use bow and arrow vavo.dk in the Description --- Before you build this --- the 2D is only a example to explain how it works tips on improving spawn rates, Efficiently the Spawner room need to be big (as you can see in the Video look down) best if the room is 2 block over and 2 blocks below the spawner and 4 blocks around the spawner so the room is 9x9x5 withe the spawner in the middle it will give 4-3 mobs per 25sec. = 500 per hour Approximately you can try look here www.youtube.com --- problems and solution look here --- it is the 5 standard error / mistakes 1 Be sure you are not in Peaceful mode 
2 you Need to be 15 or less block away from the Spawner else they will not spawn 3 if you only get 6 and not 20 or more mobs then you need to move the mobs more in 8 blocks away from the spawner 4 if some die and some need 2 or more hit to kill the last block Before they drop down ...
Video Rating: 4 / 5
now tutorial
How does the water elevator work?
Do u know if he is danish!?? xD
I just made this
Works great!
Getting the skeletons in the 9x9x5 spawn room to go up the water elevator was a little tricky though. And apparently some of them lose health to drowning because when they fall, some of them die.
considering you are speaking english and english is a stupid hard language you’re speaking pretty good
Good good…..
Yup, that’s Denmark xD
Tem-inat-oo-r.
Haha:-D Thats definetly not danish at all, im from Denmark myself:-D
Rapist accent :O
how long did you wait for the skeletons to acumulate? like to to 1000
looks like you’re being attacked by green bees.
lars ulrich is danish, right?
Thumbs up if your are danish
skelets
oh oh i’ll try it
‘Remember to eat… eat or die
amazing
dude your accent is epic
loved the vid, but Ure accent is better!!
Here is a very easy way get too many items shift click on bottle of enchanting to get unlimited stack the just hold the right mouse button and spam them
You can do it with a zombie… It’s exactly the same
…figures…
I only have a Zombie and Spider spawner…
I totally read the entire description bro
Yeaaah.. its raining hehhea!