Heated Body. A creature that touches the iron atronach or hits it with a melee attack while within 5 feet of it takes 11 (2d10) fire damage.   Illumination. The iron atronach sheds bright light in a 20-­foot radius and dim light for an additional 20 feet.   Trail of Flame. Anywhere the iron atronach walks it leaves a trail of flames behind itself. Anywhere it has walked since the end of it's last turn becomes difficult terrain for the duration and any creature that enters or starts it turn there takes 6 (1d10) fire damage.   Grounded. The iron atronach cannot be be knocked back, be knocked prone or otherwise moved against its will. However the iron atronach is incapable of Jumping, Dodging or taking the Dash action.