Part 4/5 of a colored sketch commission for meisterli !

Cobalt is supposed to grow after contact with electricity, but apparently other types of energy work just as well.

FIRST: https://www.weasyl.com/submission/1173617/comm-she-s-into-it-a
PREV: https://www.weasyl.com/submission/1173623/comm-she-s-into-it-c
NEXT: https://www.weasyl.com/submission/1173626/comm-she-s-into-it-e