Punire

Punire (means punish in Latin) is a giant godzilla-like spiritual monster being. He is a nomad who roams on worlds one by one and destroys anything that gets in his way. The purpose of the Punire is punishing the sins of the Shinigami. He will invade Soul Society and destroys any buildings and killing innocent people as a great moral lesson to the Shinigami. Today, Punire was only called a myth or a legend because he wasn't seen ever since the aftermath of the First Athrod-Shinigami. Punire only punishes the Shinigami, which means he never harmed the Athrods and the Nevak. Punire is immune to any heavy attacks including Sokyoku. His ultimate weapon is his atomic breath.

Trivia
Punire is based on Godzilla.