I made a complete Godot Visual Effects pack a while ago. Posting it here right now:
DOWNLOAD: https://bukkbeek.itch.io/effectblocks

Over 60+ customizable, low-poly stylized 3D effects for your Godot projects.
Features:
Godot-native (4.x), no plugins needed
Organized folders & ready-to-use scenes
Customizable scripts/ shaders
Included Effects:
🔥 FIRE & SMOKE
- Fire ×3 (small / big / magic)
- Smoke ×3 (small / big / poison)
- Fireballs
- Flamethrower
💥 COMBAT VFX
- Muzzle Flash ×3 (texture / smoke / sparks)
- Bullets ×2 (single / burst)
- Explosion ×3 (small / big / electric)
- Impact ×8 (dust / sci-fi / sword)
- Ground attacks ×3 (fire/ ice/ earth)
âš¡ ENERGY & ELECTRICITY
- Energy Beams ×3 (laser / plasma / electric)
- Electric Sparks ×2
- Lightning / Lightning Ball
✨ MAGIC & STYLIZED
- Sparkles
- Fireworks
- Sci-fi Portal
- Sci-fi shield
- Stylized Shader
- Hologram Shader
🌿 NATURE & AMBIENCE
- Vegetation Shader & Grass (day-night cycle)
- Falling Leaves
- Rain
- Tornado
- Dust
- Fireflies
- God rays
- Birds
💧 WATER
- Water Shader & Effects ×2 (ripples / long ripples)
📦 GROUND EFFECTS
- Pickup / Loot / Heal / Arrows / Power Up, etc.
🩸 DECALS
- Blood Splash ×2
- Bullet Holes ×3
- Slime ×2
- Cracks ×3
- Footprints ×2 (blood / mud)
- Handprints ×2 (blood / dust)
- Tire Skid
- Claw Mark