The splash effect from the ability is not applied to nether creatures though the corresponding Cinder Devil ability is.
I just tested the ability and it seems to be working properly. Note that this ability only gives the Splash buff to creatures surrounding the creature with the ability.
This ability works on my android 2.0.7 on norms, nether and nether demons, both the cinder devil and the artifact.
That’s strange. I just retested it and I was not able to reproduce the problem.
Yeah I guess I must have equipped the wrong creature though I could swear my central column sonicscreecher had it. Sorry for the false report.