Kev's Projectile Immunity Fix: Make Arrow Storms Feel Fair in Minecraft Combat
If you’ve ever built a skeleton farm, hosted a minigame on a PvE server, or tested a rapid-fire bow from a modded pack, you’ve probably noticed something odd: a mob can be visibly peppered by multiple arrows, yet only a fraction of those hits actually count. That’s not your aim failing—it’s vanilla Minecraft’s invulnerability frames (often called i-frames) doing exactly what they were designed to do: prevent damage from stacking too quickly.
Kev's Projectile Immunity Fix is a lightweight Fabric mod that tweaks this specific mechanic for non-player entities. The goal is simple and practical: let multiple projectiles deal damage when they land close together, while still keeping combat from turning into unlimited “hit spam.”
What Problem Does It Solve in Vanilla Minecraft?
In vanilla mechanics, when a living entity takes damage, it usually gains a brief hurt cooldown. During that window, extra hits—especially from fast or simultaneous sources—may be ignored or heavily reduced. This is particularly noticeable with:
- High-rate projectile setups: dispensers, rapid-fire bows, modded crossbows, or projectile-heavy mob arenas.
- Group focus fire: multiple skeletons shooting the same target at once in tight corridors or farms.
- Thrown weapons and magic bolts: projectiles from mods that hit in quick bursts.
The result is combat that can feel inconsistent: visually, you see a barrage; mechanically, the target behaves like it only took a single hit.
How Kev's Projectile Immunity Fix Works
The mod reworks how i-frames apply after projectile hits—specifically for non-player entities (mobs and other living entities). When a projectile strikes, the mod temporarily disables invulnerability frames so additional projectiles can deal their full damage if they connect in the same moment or rapid sequence. To keep things balanced, it introduces a configurable limiter: after a set number of consecutive projectile hits, the mod restores a cooldown period that behaves more like vanilla.
This creates a rhythm that feels natural in real gameplay: a volley is meaningful, but endless projectile spam still meets a protective cooldown.
Players Are Not Affected (Why That Matters)
A key design choice is scope. This mod does not apply to players—only to mobs and other living entities. That’s a big deal for servers and survival worlds where PvP balance, latency, and fairness can get complicated fast. By limiting changes to non-player combat, you can tune farms, arenas, and mob encounters without accidentally rewriting player-versus-player expectations.
Configuration: Fine-Tune the Feel of Projectile Combat
On first launch, the mod generates a config file at config/projectileimmunityfix.json. You can adjust values to match your server’s difficulty, your modpack’s power level, or the pacing you want in adventure maps.
- maxHitsBeforeCooldown: Maximum consecutive projectile hits allowed before normal i-frames return (default: 10).
- cooldownTicks: How long (in ticks) the entity is protected after exceeding the max hits (default: 20 ticks / 1 second).
- timeWithoutHitResetTicks: How long without getting hit before the counter resets (default: 20 ticks / 1 second).
In practice, increasing maxHitsBeforeCooldown makes “arrow storms” more lethal, while increasing cooldownTicks reins in automatic turret-style builds. The reset timer helps prevent weird edge cases where a mob stays “primed” for cooldown forever while wandering around a biome or trapped in a block-based contraption.
Where This Mod Shines: Farms, Dungeons, and Modded Projectiles
This fix is especially satisfying in technical builds and content-heavy modpacks. If you run mob grinders that rely on dispensers or automated bows, the damage you see is closer to the damage you expect. If you’re designing a dungeon encounter where a boss is meant to be threatened by multiple ranged minions, the fight becomes more responsive to positioning and timing rather than hidden cooldown math.
And if you’re curating a pack with lots of ranged weapons, it helps different projectile types feel consistent across biomes, structures, and server tick conditions. For a smooth setup in a bigger mod list, some players mention that this mod can be easily installed via the foxygame.net launcher—a convenient, flexible, and modern Minecraft launcher where you can download mods right from the menu. It’s a neat time-saver when you’re iterating on combat balance and swapping versions frequently.
Requirements and Compatibility Notes
Kev's Projectile Immunity Fix is built for Minecraft 1.21.1 with the Fabric Loader and Fabric API. It’s designed to be lightweight, and it was tested alongside tools like Dummy targets and projectile-focused mods (for example, high-rate bow mods) to validate the i-frame behavior under heavy fire.
As with any combat-focused change, the best approach is to treat it like a balance knob: install it, test it in your typical gameplay loop (farms, raids, spawners, and custom arenas), then tweak the config until it matches the challenge level you want.
Conclusion: A Small Mechanical Change with Big Combat Payoff
Kev's Projectile Immunity Fix doesn’t try to reinvent Minecraft combat—it targets one very specific vanilla quirk that becomes obvious the moment you scale up projectiles. By letting mobs properly register clustered projectile hits (while still enforcing a configurable cooldown), it makes ranged damage feel clearer, fairer, and more in line with what’s happening on screen. If your world, server, or modpack leans into bows, bolts, and automated projectile builds, this is one of those subtle fixes that can make the entire experience feel more consistent.