GPU Effects require 'Generate Mesh Distance Fields' to be turned on!
UE4 Mannequin character with animation used in demo scene, FX will attach to any type Skeletal mesh.
List of FX:
Ash
Black Ooze
Blood
Cosmic
Electric
Furnace
Lava
Lightning
Neon
Radioactive
Rainbow
Ribbon - Dark
Ribbon - Light
Slime
Sulfur
Water