That's it man. Game over man, game over!
https://www.youtube.com/watch?v=A_j8W-SDefU
What game ending glitches have you encountered?
Here are 2 1/2 for Dark Wizard:
1) - If you get adventurous (and don't watch carefully) as you conquer territories you can cut your lines of communication to your starting castle. If that happens you can't restore those lines of communication and get to watch as your previously conquered territories fall one by one until the home castle falls. Game over.
2) For some odd reason if you take the Seal of the Demons to the blacksmith he can temper it for you. You will get back a very low level weapon (it varies which one you get). You can't use the weapon to get the fog chime nor can you retemper the former Seal of the Demons to get it back. So you can't summon Tagon to get to Viosdia so you can take on Velonese. No way to finish the game.
2.5) There is a way to accidentally take away your two (or three if you are playing as Krystal) flying warriors' ability to fly. Which means you can't get the sword Slayer which you need to slay (as it were) the Dark God Arliman. Not a game killer since that is the last battle and if you don't do certain things in the game you won't encounter him anyway. There is also a fix if you catch it early enough - but it is not intuitive at all.