kyoshinhei
The "God Warrior" in Kaze no Tani no Nausicaa, a bioweapon created by the ancients. It is a giant humanoid with a dome-shaped skull and lanky body, whose primary armament is an immensely powerful energy beam fired from its mouth.
The movie version was little more than a disintegrating mess, being "born" prematurely and collapsing after firing its beam. The manga kyoshinhei could fly using luminous 'wings' and emitted a 'poisonous light' that sickened and eventually killed anyone who remained near it. This version was adopted by Nausicaa and named Ohma.