Here's something stupid.
I took one of the heads I swapped on a Lancer and attached it to a wire.
Then I took the left arm of a spare Ardus body. I cut off the entire forearm up to the elbow. From this piece, I removed the fingers and the palm of the hand, keeping only the armor over the knuckles and the arm.
I attached a hand from I think a Bloodletter? (trading bits or ebay shopping for sprues is useful) to this and drilled starting at the palm all the way through the other side of the arm.
On the DK's body I made the same cut at the elbow. The parts align surprisingly well.
A hole was drilled into the middle of this cut for obvious reasons.
Using the wire with the skull at the end I attached the new hand and Ardus gauntlet to the DK's stump.
Covered the wire with some greenstuff (putting a clump of it at the palm and stretching and twisting it all the way up to the skull - keep your fingers wet while doing this si they stick to the greenstuff less).
And finally after letting the green stuff set I covered it with some acrylic gel (Vallejo Water effects), this will eventually shrink to look like messy, tiny flames adding some additional texture to the greenstuff body.
So yeah... did that.