By Dr Mike
Buy as: Hex, Power Null, Stun or other offensive attack types.
Intensity effect: Duration of the fire cage (and hence total damage).
If a firecage attack succeeds, the target gets encircled by fiery rings that stop them from moving (but not attacking). AI's will 50/50 either attack the firecage or cower inside it. The target inside a fire cgae takes a small amount of heat damage.
If the firecage is destroyed prematurely, before burning out, it will explode violently.