Simplify the following text for a Grade 4 native English-speaking person.
Original: The final battle will take place on the plain of VÃ grÃ Ã r , following which Midgard and almost all life on it will be destroyed , with the earth sinking into the sea , only to rise again , fertile and green .
Simplified: The final battle will take place on the plain of Vigrond . Midgard and almost all life on it will be destroyed , with the earth sinking into the sea .