Whenever lightning struck his fortified Mana on his body and shattered it, Almond could feel the essence of lightning due to his connection to his Mana.
His mana acted like a medium of sorts that conveyed the power of lightning. It was like a wild signal that was up to him to interpret and comprehend.
And then, when the lightning pass through his body after shattering his defense, his body itself imprinted the power of lightning. It was up to him to recognize and understand its impact. To perceive his entire body's reaction and lightning's effect on his flesh and blood.
Generally, the biggest starting obstacle is staying focused enough to perceive the lightning's nature and essence amidst pain.
But, owing to Almond's tireless and arduous self-training in Physical Enhancement that reflected his desperation and determination both before he entered the Labyrinth, his capacity for enduring pain had reached remarkable heights.