New CollisionDamage

The mod provides a potion effect called Collision Damage. An entity under the effect deals damage to nearby entities in proportion to how quickly it is moving. Faster movement hurts more, and a minimum speed is needed before any damage occurs. The default minimum is 5, and the damage multiplier for each speed threshold can be adjusted in the mod's configuration file.

When speed passes certain thresholds, the affected entity breaks softer blocks like dirt, sand and wood, with a default speed of 10. Harder blocks such as stone and ores need a default speed of 15. At even higher speeds, around 20 by default, the entity gains a brief stretch of invincibility, becoming immune to damage.

The mod has no built-in source for the potion effect, so pack makers and server owners must devise their own way to hand it out. Client and server both need the mod. The code is released under the Creative Commons Attribution 4.0 license, so the mod is not open source. Files exist for 1.20.1 and for 1.21.1 – 26.2, with source code publicly available.