Terrible movie - at least 5 stupid and illogical things
There are at least about five things in this film that are illogical and make no sense. None of these are disbelief-suspension issues--they are stupidity issues.
For example:
(1)(a) The entire village holds a big celebration for the protagonist after he magically causes a landslide that puts a bunch of rocks in front of the dragon's lair, because, apparently, everyone is absolutely certain the dragon has been killed, despite the fact that all that has happened is that the protagonist has used a spell to create a landslide, and despite the fact that there is absolutely no evidence that the dragon has actually been killed by the landslide, no evidence that the dragon has even been injured by the landslide, and no evidence that it wouldn't be a simple matter for the dragon to remove enough rocks from the entrance to its lair for the landslide to represent any more than a minor annoyance.
(1)(b)Even the protagonist himself is certain that he has killed the dragon, despite the fact that he apparently has psychic powers, as we learned when he remotely viewed a member of his party being killed despite not actually seeing it with his eyes.
(2)(a) The princess clearly commits fraud on the lottery and publicly admits to having done so, yet the results of her fraud are allowed to stand by the only person whose vote that matters, her father, the king, who just a minute before, thought that the lottery was legitimate and was nevertheless about to nullify it merely on grounds that his daughter's name was drawn even though in a completely fair way. The reason--because the princess said she wanted the result to stand, and this somehow vetoes what the king wants. Who cares what she says though?
(2)(b) And why would anyone other than a suicidal person go through such efforts to ensure she is killed by a dragon, no matter what the circumstances? There is no indication that the princess is suicidal.
(2)(c) And doesn't anyone care about the good of the state--presumably having a princess would avoid the turmoil of a succession squabble after the king's death. The princess is apparently the only child of the king. Everyone should be interested in ensuring that she does not die. None of this makes any sense.
(3) The protagonist's love interest clearly commits fraud on the lottery by pretending to be male her whole life. After she admits to having been female, the king should have at least considered forgoing the lottery one year and making her the sacrifice, as a penalty, putting her in jail, or, at the very least, putting her name in the pot a few times to increase her chances. She should have one lot for each year she skipped out, at the very least. Instead, she is given the same treatment as everyone else, and it is as if her fraud never occurred. All of this, with no outcry, despite the fact that everyone knows that the princess' name is never put in the pot and everyone is clearly upset about that, even though, presumably, she's the future ruler.
(4) A tiny nonmagical shield made by a peasant girl protects the protagonist against a torrent of fire so large that was blown at him for so long that it would have easily disintegrated a 10-story building. There is no way any kind of shield could protect someone from that sort of onslaught. The fire completely engulfed his entire person for several seconds, and was quite intense and hot. He used no spell to protect himself. He should have suffocated AND burned to death.
(5) The wizard tells the protagonist to destroy the amulet, and that he would just know when to do it. Nevertheless, when the time comes, the wizard tells him to destroy the amulet. The wizard should have just said, "I'll tell you when to destroy the amulet, but if I'm out of earshot, do it when it gets really bright." The wizard is trying to make it seem like a big mystical thing by telling him that he'd know when the time came to destroy it, but it really isn't a big mystical thing.
Regardless of all of the above, the lead actor Peter MacNicol is a total cheeseball, and that alone would've ruined the film.
What a terrible film. None of this is a matter of disbelief-suspension, which is what silly people say in response to someone pointing out problems like this. Disbelief-suspension is what you do in response to the fact that there's a dragon, or magic. You have to suspend your disbelief in dragons and magic to watch movies like this, and everyone knows that. All of the above are matters of logic. These are serious flaws in this movie.
This is probably the worst fantasy film I have ever seen. I am having trouble thinking of a worse one. The 6.8 rating here at IMDb that this currently has is laughable. This movie deserves no higher than a 2 or 3 from anyone.