[...] The other shape,
If shape it might be call'd that shape had none
Distinguishable in member, joynt, or limb,
Or substance might be call'd that shadow seem'd,
For each seem'd either; black it stood as Night,
Fierce as ten Furies, terrible as Hell,
And shook a dreadful Dart; what seem'd his head
The likeness of a Kingly Crown had on.
Appropriately Lovecraftian, I'd say. But note that Satan (so call him now, his former name is heard no more in Heav'n) was, to say the least, unimpressed.