I'm thinking of a possible combo base called Crimson. (May be blood instead of crimson) and tied to cinder skin
It would be red dark countershaded special
The things that can produce it would be:
Shard x pewter
Shard x titanium
Shard x onyx
Shard x noctis
Shard x ebony

Anjeer x pewter
Anjeer x titanium
Anjeer x onyx
Anjeer x noctis
Anjeer x ebony


Demonic x pewter
Demonic x titanium
Demonic x onyx
Demonic x noctis
Demonic x ebony

Bloodstone x pewter
Bloodstone x titanium
Bloodstone x onyx
Bloodstone x noctis
Bloodstone x ebony

And

Fiery x pewter
Fiery x titanium
Fiery x onyx
Fiery x noctis
Fiery x ebony