Board Thread:Suggestions forum/@comment-26274215-20160617155453/@comment-28153737-20160620152021

Wargaz cc wrote: Minecraft has alternative dimensions, so adding a new dimensions is easy with the help of the Forge. For example, the Nether may have a dimension ID like 1, and the Forge let us use the same mechanics as vanilla Minecraft used. The dimension ID of Middle-earth is 100, and a dimension is a collection of biomes (or a biome like Utumno). However, the Forge won't let you touch the core part of Minecraft like water and lava. I don't mean that your suggestion is hard to code. Shields of Minecraft 1.8 are different for a Mincraft 1.7.10 mod, otherwise Mevans would backport them long time ago like other 1.8 features we have.

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shields were never in 1.8... they were added in 1.9...