rise of the brave tangled dragons riddle.

If you want the ultimate power of four,
you'll need the key to open the door.
To find the key look to the heart of flight,
you'll also need strength, wit and might.
To find the door converge seasons and key,
and the ultimate power shall be brought to thee.
But be warned, for the power is strong,
it is terribly dangerous to hold it for long.