This is a fun one! So Amargasaurus is hotly debated by paleontologists, because there's three different ways the neck spines could have worked. For a long time everybody assumed the "sails" thing was right, and most art of them uses it, but there's arguments for independent horns as well.
Although admittedly the most convincing argument is probably for the meaty hump, which I didn't draw here because it's just not as fun to draw.
Anyway. The spikier, larger horns, where the bone spikes are sheathed in keratin, seemed very aggressive to me, since they had to have been used for defense in fights, whereas the sails would probably have been brightly colored and a sexual selection thing. Ergo my doing these opposing characters, aggressive War and gentle, tired Peace.
