360 Rapid Improvement, Trapped?

Six Cultivators grouped together and cast a combined Poison Spell, gathering a replicated form of the poisonous miasma and spreading it around the area to obstruct his vision. Even if William was immune to poison, they could obstruct his vision and force him to reveal himself when using a detection Spell.

William smiled and dodged the slow poison Spell. Even if it covered a large radius, William had the entire Velos Continent as his battlefield if he so desired. He gathered his Mana and created a poison Spell of his own. He switched to the Poison Elemental Form and created some Soul-Sapping Necrotoxin to add to his Spell, then threw it all at once towards his opponents.