User blog comment:Miskos3/Fairy Tail 519: Show Me Your Smile, Review/@comment-24367018-20170127190312/@comment-24489996-20170127225922

Five Lost「, Goshiki Zekū (Faiburosuto)」: A spell that creates a magical orb that causes the victim to lose all five of their senses upon contact.

Yeah, Howzer lost all of his senses when the attack hit, which is similar to Erza losing hers during the fight with Kyoka. He even stated that he was somewhat dying moments before Merlin healed him with ease.