[Python+XML] Valhalla 2.0

This is my first wonder and it has a pretty spectacular ability! Hope this comes in useful! Pictures Below! If you have any questions or problems please visit my wonder thread here
Valhalla
Ability: +25% Great General emergence, +2 Great Prophet, and gives the Valhalla promotion to units built in this city, the Valhalla promotion reborns melee and naval units that died in you capital!
Requirements: Compass and a city next to a coast.
Obsolete: Astronomy
Cost: 400
Update: The Update is here! This wonder now has a movie thanks to Zeta Nexus.
Note: 319. If a unit with the Valhalla promotion dies and you don't have any cities you will get a Python error.
Credits: The_J for the base of the python script, JustATourist for the wonder art and button, and Zeta Nexus for the movie.