Inspired by Gamemode 4 and TTB, I have gotten to work on a small yet fun project, which I call Esrea's Extensions!

Let's get to the explanations,shall we?

Includes:
-Custom Crafting Table
-New custom block called the Gas Emitter (effects everyone in a 5-block radius, good for traps and the likes)
-Ways to craft previously uncraftable items (Mob spawners, Mob eggs for the 4 mobs you can get heads from excluding ender dragon)
-Throwing cobblestone or gravel on the ground automatically places the blocks (only in quantities of one)
-Name a Zombie to Jeff or a Wither Skeleton to SCP049 and fight new minibosses
-Standing on soulsand gives you the Wither effect

Bugs:
-Gravel can break bedrock
-Breaking cobble or gravel is a bit buggy as it places itself again
-Shulkers can be farmed
-Custom Crafters are a bit glitchy

New items and blocks:
-Jeff's Knife: A pretty decent Iron sword, nothing too special
-2 axes that can be dropped by SCP049 that are fairly good to have (They drop damaged, but one has mending)
-Custom Crafting Table (Rename a dispenser to Crafter and throw it on the ground)
-Gas Emitter (Detailed above)

Extra:
-Esrea's Extensions V1.2 is in its planning stages, in which the gravel and cobble bugs will be fixed.
-Esrea's Extensions is part of a series, and is actually composed of individually-programmed modules which will be released to the public at an unknown date.
-Next in the series of modules is a machine called Bhexion's Blocks, and, unlike Esrea, uses a resource pack which does not interfere with any other textures.
-You get one of each new item upon installing, as there are chests at the front of the machine which hold items in crafting recipe form, so just take the items and craft them, and you have one of each new item and block excluding miniboss drops. This is of course not necessary.
-The soulsand effect will be changed to blindness in Esrea V1.2
-Esrea V1.2 will hopefully be more multiplayer-friendly.

Download: https://www.mediafire.com/?ts57zz1o70tlyhs

Thanks to Jragon014 for the tutorials on how to make self-placing blocks, it helped with a lot of this pack.
Custom Minibosses were made using minecraft.tools/en/spawn.php