Loot Overhaul Mod

Loot Overhaul Mod (1.12.2) adds a lot to the vanilla loot system, including new loot conditions, functions, and loot types.

Loot Overhaul Mod (1.12.2) - Happy Loot-Making 1

Features:

Block loot tables

Editing block drops is now as easy as editing loot tables!
You can replace (or add to with _extra, see below) any block drops using loot tables.
To replace block drops, use the loot table with the name :blocks/. So you can override vanilla grass (minecraft:grass) drops with the loot table minecraft:blocks/grass. For a modded block, lets say with the id biomesoplenty:mud, it would be biomesoplenty:blocks/mud.
Block loot table drops can be disabled in the config file (in case it causes issues).

Additions to loot tables (without replacing them)

Sometimes when making a custom map, or modpack, you don’t want to replace a whole loot table. You just want a way to add a couple items to it. With this mod, you can do that too.
To add to a loot table, simply create another loot table with the same name as the one you want to add to, with _extra at the end (so adding extras to entities/zombie would be in entities/zombie_extra).
This feature can be disabled in the config file, or you can blacklist certain loot tables from trying to pull in extras, in case you have a mod that happens to have a loot table ending in _extra.

Additions to every entity death or block drop table

The two loot tables minecraft:entities/all and minecraft:blocks/all allow you to add a drop to every entity death loot or block drop, respectively. This would probably be most useful combined with loot conditions, for extremely rare drops and the like.
Both of those can be disabled in the config file.

Entity/Global Variables

This mod contains an unnecessarily complicated way to store variables, either globally or for individual entities.
It’s mostly as an alternative to using scoreboard scores, which are clunky to set up. They can store strings too, which scoreboards can’t do.
/globalvar [operation]
/entityvar [operation]

Command/Loot Trigger Item

The loot and command trigger items are a way you can generate loot or run a command when the item enters a player’s inventory. They are mainly meant as a way to provide more complicated loot without needing a bunch of command blocks/functions running. Set Unwrap:true on either so the player has to right click them to open them.
Set the loot table in the loot trigger by using LootTable:, and you can also give it a seed with Seed:. Leave out the seed if you want random loot.
/give @p lootoverhaul:trigger_loot 1 0 {Unwrap:true,LootTable:”minecraft:entities/zombie”,Seed:300L}
The command trigger can run lists of commands. You can give it a simple list of commands like so:
/give @p lootoverhaul:trigger_command 1 0 {CommandList:[“say First Command”, “say Second Command”, “say Third Command”]}
You can also chain command groups… this is a bit complicated. You can add the next command list to run in a tag called Next, and keep chaining them. When it reaches the last list of commands, it will restart from the first one unless you add Stop:true to the last one.
/give @p lootoverhaul:trigger_command 1 0 {Unwrap:true,CommandList:[“say First Command”],Next:{Unwrap:true,CommandList:[“say Second Command”],Next:{Unwrap:true,CommandList:[“say Third Command”],Stop:true}}}
Finally, you can also add delays to the commands, which is useful if they are running automatically (Unwrap is false)
/give @p lootoverhaul:trigger_command 1 0 {Delay:20,CommandList:[“say First Command”],Next:{Delay:20,CommandList:[“say Second Command”],Next:{Delay:20,CommandList:[“say Third Command”],Stop:true}}}

New Loot Types

Well, kind of. The loot system currently only supports items, so there are 6 items which will have a special effect when they drop: spawning mobs, placing blocks, creating structures, filling an area, running commands, or applying a potion effect.

Loot Conditions