from Wikipedia: Norval Morrisseau, also known as Copper Thunderbird, was an Indigenous Canadian artist from the Bingwi Neyaashi Anishinaabek First Nation. He is widely regarded as the grandfather of contemporary Indigenous art in Canada.
(yes I'm aware I misspelled his name as the trigger word, oops)
trained on Dreamshaper 8 so you'll probably get best results with that but seems to work okay on other illustrative type checkpoints as far as I've tested.
Simple prompts appear to be best, but maybe experiment and see what happens - this is probably more dependent on the checkpoint than anything.
Strength seems best at 0.6 - higher makes images more abstract, lower has the opposite effect
Best cfg (imo) is 4.0