The moving sacrifice of Mothra was key to Godzilla's victory over Ghidorah

At first, Ghidorah beated Godzilla with all his three heads, making the dinosaur fall down. Godzilla then breathed the blue flame to push Ghidorah away. Mothra casted a blast just in time, making Ghidorah's heads stuck to the building.

 

Godzilla – King of Monsters God Rays as New Weapon of Mothra

Fairy tales tell of a winged creature of blinding light, an angel of the clouds whose god-like luminescence has the power to shatter the sky. Her name is Mothra.