Since Mordikaar was becoming my favorite warlock in Mk1, the dramatic changes have left me at a loss on what to do with him. These are my suggestions for Mordikaar.
1, give him spirit rendering back. Its fun and fluffy.
2, His spell list is lacking.
A. Death Sentence is not Doom Mark, but it is a MK2 replacement. I personally would like to see "marked for death".
B. Essence Blast, is an O.K. spell i think i cast it once is Mk1. i just like the use of my troops more. Range 8 would fix this.
C. Ghost Walk. Once again, its an MK2 replacement. I too would love to see it as an upkeep. Dont get your hopes up though.
D. Revive. This is where his list goes waaaayy down hill.

this spell does not belong a caster that doesnt collect souls or gain extra fury in some way.
My suggestion: Spirit In Amber:cost 1 , bring back 1 trooper model for each fury spent up to 3. These models are destroyed at the end of this turn. This spell may be cast once per turn.

This fix would make it useable and not overpowered.
E. Void Gate. Mordikaar does not need this expensive spell. He has to get Manifest Void back. If thats not an option, give him lamentation.
Feat: its good as written, but not with the spell list that mordikaar has. With the spells he has it requires him to be close to the front lines, which is not good because he has to use all of his fury in a turn.
If you play him from the back, a ranged army can now walk out of it and blast the skorne army without any affects of the feat.
I suggest taking back to MK1. Its the only board control feat the Skorne have, and it lets us survive against a heavy ranged list like Cygnar and Retribution.
What do you think?