Iron Dragon's Scales

is an Iron Dragon Slayer Magic Spell.

Description
The user covers part of their body (or the entirety of it) with steel scales to dramatically increase both their offense and their defense. These scales are strong enough to shatter rock and bone alike, resilient against regular flames, and much harder than normal iron (just like Natsu Dragneel's flames), being even capable of stopping a charged, downward slash from the gargantuan sword of a physically powerful individual without fail, with the assailant claiming that his blade could easily crush iron.