The Start Mod

Start Mod adds a dimension called Start, a pure white void that is reached through a Start Portal. The dimension is added through a datapack using Minecraft's experimental features, so a warning appears when the world starts and the dimension is available only in worlds that accept those features. The mod also adds a range of blocks, among them buildable void blocks that let players construct within the empty white space.

The dimension is populated by Startermen, and the mod adds a Stun effect that only Startermen apply. Starter Pearls work as inverse Ender Pearls: when a player throws one, the thrower is pulled toward the hit point instead of the player being teleported. The mod requires Fabric API, runs on Fabric for 26.1 – 26.1.2 and is released under the MIT License, though it is not open source. Servers that run it need every player to install it too. The Stun texture is credited to bartun2010.