Cosmic Void Block

Cosmic Void Mod is a lightweight NeoForge mod for Minecraft 1.21.1 that adds a new decorative block called the Cosmic Void Block. When placed, the block uses Minecraft’s native End Portal rendering effect to create an animated, star-filled void across its surfaces while still behaving like a solid block with normal collision. The block can be found in the Building Blocks creative tab and also has its own custom inventory and held-item texture.

The mod is designed to be simple and focused, adding only the Cosmic Void Block without changing vanilla gameplay mechanics or requiring additional mods.