I think Hades may be completely CGI or at the very least be partially CGI. The hair alone would need to be CGI because no way they could just set fire to a guy’s head.
Lord knows the only offensive magic we’ve seen them do is fireballs and beams of light…..MP’s right, I don’t think they can afford the fire hair thingie. The most they could do is give Hades a dark shade of blue hair, modeled to a similar look of the flames.
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"If you go as far as you can see...you will then see enough to go even further." - Finn Balor