Addendum
by eltrutlikes
Addendum adds end-themed blocks for NeoForge 1.21.1, extending the ender palette with stairs, slabs, walls and new block sets.
What it does
The blocks follow the end-stone look of the ender palette, with a set of polished end stone pieces and bricks made from purpur. Shulker blocks use swirl patterns drawn from the shulker design. Each block type comes with its stairs, slabs and walls, so end-themed builds can use a wider set of shapes without leaving the theme.
It requires Differentiate to run, and it works alongside Quark, Midori, Lepton and loaded pressure plates and buttons. The code is open source under the GNU Lesser General Public License v2.1 only. Client and server both need the mod, because the blocks are placed and synced on both sides. Files are published for NeoForge on 1.21.1 only, with 3.1.0 as the latest file from 2026-06-30.
Key features
Ender-themed block set
New blocks extend the end palette with a polished end stone set and purpur bricks.
Stairs, slabs and walls
Each block type includes matching stairs, slabs and walls for construction work.
Shulker swirl blocks
Shulker blocks with swirl patterns use textures based on the shulker design.
Automatic compatibility
Blocks work with Quark, Midori, Lepton and loaded pressure plates and buttons without extra setup.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
How it compares
Stairs And Slabs is NeoForge only, for 1.21.8, with All rights reserved licensing and not open source. Bricks bricks bricks covers NeoForge 1.21.4 – 1.21.8, also All rights reserved and not open source. Legend's Missing Blocks runs on Fabric and NeoForge for 1.21.1 – 1.21.8 under the MIT License, but is not open source. Vanilla Block Variants is NeoForge only for 26.1 – 26.2 and is open source under the Apache License 2.0. Addendum is the only option here on NeoForge 1.21.1, open source under the GNU Lesser General Public License v2.1 only.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Addendum | NeoForge | 1.21.1 | Client and server | 2026-06-30 |
| Stairs And Slabs | NeoForge | 1.21.8 | Client and server | 2026-02-28 |
| Bricks bricks bricks | NeoForge | 1.21.4 – 1.21.8 | Client and server | 2025-09-01 |
| Legend's Missing Blocks | Fabric and NeoForge | 1.21.1 – 1.21.8 | Client and server | 2026-02-18 |
| Vanilla Block Variants | NeoForge | 26.1 – 26.2 | Client and server | 2026-08-16 |
Questions
Does Addendum need Differentiate?
Does Addendum have to be installed on the server?
Which mods does Addendum work with?
In the catalog
Addendum is one of 12,078 Decoration mods on ModsFinder, and one of 5,201 Decoration mods for NeoForge. 32,366 mods support Minecraft 1.21.1.
More from eltrutlikes
Similar mods
What the author says
Addendum is a port of the Additional Ender Blocks mod by cleverpanda714, which is allowed under the license. It focuses on expanding the number of blocks available for end-themed builds! Check out the gallery for more information.
Official listing
- Modrinth page
- modrinth.com/mod/addenda
- Owner
- eltrutlikes
- Published
- 2026-06-06
- Updated on Modrinth
- 2026-06-30
- Facts verified
- 2026-10-15