Nah, keep the white buffalo - they do (or did) exist. And they are held sacred in some cultures. Just an issue for me. And I think some rules put them to use.
One heck of a close up for the dead dude.

For buffalo hunters: any mounted figure firing with a bow, a lance (pointing, not firing), a musket, a rifle will do. Or you can go the 'on foot' route of driving the herd over a 'buffalo jump' which means any foot figure, male or female, that looks like its waving it's arms. Just don't go Alpha (movie) and make the jump absurdly tall - the one at the site of Rosebud battlefield was maybe 20' or less in height (saw in person). The real trick is to find downed buffalo to show the kills. Never found any in 15 mm so I just - carefully - removed the bases from standing animals and then 'squashed' them a bit with a smooth faced, hand held sledge hammer. Alas, they sit primed and waiting to get painted. Hoping to 'skin' a few to make a field similar to what is shown in Dances with Wolves movie. Might try adding an arrow or three sticking out of the not yet skinned dead animals.
For anevilgiraffe - from a review of the movie that never got a 'real theatrical release', I saw on TV - "The title beast looks like a hung-over carnival prize despite attempts at camouflage via hokey sound track noise, busy John Barry scoring, murky photography and fast editing." One of the most laughable 'special' effects I've ever seen put on screen. Not just bad, really, really bad - cheesy 1950s sci-fi bad. So bad that the rest of the movie suffered as a result. Long ago but I don't remember much of a cohesive story line, seemed to jump from place to place. But to each their own, eye of the beholder and all that.
I do rather like the image, however, of a 'hung-over carnival prize'. That might be a starting point for a game - maybe not Old West game, maybe a pulp game.

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Oh, and I am a fan of Charles Bronson, probably why I stuck it out way back when to watch this 'turkey' of a white buffalo movie to the bitter end.