AFK Mob Killing Farm(Magma Block)

As we all know, Mojang removed ability for mob to spawn on magma block in one of the 1.10 snapshot.

This feature removal caused former magma block trap stop functioning.

However, there is another to bypass it but it require som 'extra' steps.

Difficulty: Easy/Moderate

Things you will need:
1) Magma Block
2) Dungeons
3) Water Buckets

Steps:
1) You will need find a dungeon

2) You need to prevent mob spawn by placing lights around the spawners. You don't want mob spawning while working on farm right?
 
3) Now, you need to create a water flow that push mob toward a 'hole'

4) Put sign at the end of the water flow

5) Dig 3 block down and place magma block
 
6) Remove the light in the dungeon try allow mob spawn

Now you're done, you have the most basic magma block trap.

However, there's some add on you can add to improve the efficiency and safeness of the farm.

Safety fence addon:
The most basic design doesn't provide safety condition for player to collect the loot and AFK farming as the mob can still moving around.

To fix this, you'll need:
Fences(Any type)

Steps:
Pretty simple, just put fence in front magma block!

You can collect loot without being attacked by mobs!

By the way, this addon cause some of the loot became unobtainable... But don't worry, the next addon will resolve this issue!

Automatic Collector Addon:
Sometimes automatic makes things perfect right? This mob spawner can be modified to became fully automatic. You maximize amount of loot collected with this design.

The design can be vary.

You will need:
1) Hopper
2) Redstone
3) Rails
4) Powered Rails
5) Chests

Steps:
1) First you need to dig hole around the collecting point. Like this:

2) Now you need to construct railway system. For this part, it is up to users. I prefer using powered rail as the part of the railway system.
This is my railway design

3) You need to place a chest and hopper as a collection point

4) Once you done create collection point, you will need to test the railway.

5) If the railway doesn't function properly try making some tweaks

6) Profit!

7) Oh yes, if you using this design. You should remove the fence because sometimes loot will drop through the fence and decrease the amount of loot collected.