nightbringer is not immune to instant death(I KNOW HE'S GOD, WHATS UP WITH THAT!)
the skulltaker has I 5 4 attacks and ws 7, he also has furious charge so... he hits on 3's then all needs is too roll a 4 and the night bringer to fail his save and he's dead, because all rending attacks from the skulltaker inflicts instant death, oh yea skulltaker rends on 4+ not 6+
W:9 D:0 L:0
W:21 D:2 L:3
If you want peace.....prepare for war!