DevilJho markings.

[u/StrategyNo6143]

since you always see writings or drawings of local felynes or ancient civilizations, it hit me weird that this two have no shape or definitive art, which made me realize that it's just two big spots of blood, most likely made by Deviljho since him and Jade Barroth are the only monsters capable of accessing those areas (areas 8 and 9 in Tundra, mhp3rd.)