Tiamat

Tiamat (ティアマト) is a series of state-of-the-art hypersonic intercontinental thermonuclear cruise missiles developed by the U.S. military. It was used for the first time against Tomura Shigaraki.

Description
Tiamat uses an archetypal intercontinental cruise missile design for advanced thermonuclear weaponry. It has visibly large wings, fin stabilizers and a powerful propulsion allowing it to move at hypersonic speeds. Each missile has a serial number above its wings.

The No. 1 Pro Hero of the United States, Star and Stripe, has a special authority to request the missiles from U.S. military commander Agpar. If the request is accepted, the missiles will be sent shortly after and reach their destination in a short amount of time. Star and Stripe uses the missiles in conjunction with her air construct to deliver a powerful blow with the intention of killing Tomura.

Commander Agpar has implied that the usage of the Tiamat missiles is against several international/national laws and regulations outside of war and that Star and Stripe requesting them will cause her to lose her hero license.

Trivia

 * is the name of the Babylonian goddess of the primordial sea and chaos.