Illustrated D&D scene

Will consist of four fairly detailed characters in the foreground, a bearded character above overlooking the group, and a semi-detailed square obsidian tower or two in the distance. Figure one will be a bearded old man w/ spectral bat wings, the second will be a semi skeletal warrior, the next a man holding a skull and a pipe, the next a man in a wheelchair, the figure above is to be a rough 1 for 1 drawing of a man's face, the towers would be pure black and stretch to the sky. I can provide some visual references if requested.