He's based off of a Scaly-foot Snail whose shells are made of iron and they live in/around underwater volcanic vents. He's a spicy boy.

~MOSTLY SQUISHY, including his "horns"
~Dark grey spines can harden into iron spikes all over his body like armor as well as shoot out
~Variation of an Iron symbol on his chest
~Eyes and inner "border" (everything light red + his white pupils) canonically glow in the dark
~Drool is numbing (also glows in the dark!) and red! I forgot to add that into the reference but like a lighter red than his lightest red
~Technically both male and female sexes, but identifies as male
~Eyeliner is permanent like his chest symbol