Riddle answer consists of 4 characters and was created by EveretWright
Before it’s born, its skeleton does grow upon the land.
Then near the sea it grows and grows until its form is grand.
And though it swims upon the waves, it dies upon the sand.
Guest:I strike in a flash, yet no thunder is heard, A moment of clarity, in one brilliant word. Not found in a storm, but in minds I play, What am I that can change your day?