Though her burgeoning eldritch nature and complicated relationship with surface dwellers lead Mari to prefer the shadowy quiet of the deep ocean, she does occasionally return to the place - and form - of her origin. This time, her lovecraftian paramour suggested that their latest brood might rival Mount Aris in size, so Mari just had to go and verify for herself. Meanwhile, her mortal former peers get a sneak preview of the next set of leviathans due to ply Aris’ waters.
 
Never mind the hoofprint she’ll be leaving in the foothills there; it won’t turn into a seething locus of otherworldly magic that overflows with uncontrollable supernatural fertility. And never mind the damage from her underestimating her own size a little and grinding the side off the mountain with her womb. It’ll buff out. Probably.
 
Art by Silfoe, with additional big thanks to Klamnei for commissioning.  
Pregnancy edit with thanks to nsfwbonbon