Ancient Magic: Bazoo! Mahou Sekai! is an obscure Wizarding School console RPG released for the Super Famicom in 1993; it was never released outside of Japan, but an unofficial fan translation is available.
This game provides examples of:
Alas, Poor Villain: Invoked for Shadozel, who has his extremely sympathetic reasons for doing what he did dumped on you all at once right as he dies.
Arbitrary Headcount Limit: For most of the game, fate conspires to limit your party to four people. When it's time for the big final assault and everyone is gathered in one place, surprise, it's revealed that Palu's Mirror can only teleport four people.
Ascended Extra: At one point in the game, a random castle guard, Garland, joins you for a single battle. Some twenty to thirty hours of play later, near the very end of the game when you're assembling your party for the big final assault, you have the option of magically summoning him to bring him with you. He reacts with suitable shock to someone he barely knows yanking him out of his life to save the world.
Awesome, but Impractical: The titular Ancient Magic spells tend to be overpriced and not very useful against bosses, which are the only really hard part of the game.
Boring, but Practical: The 'Charm' spell (which inflicts sleep very cheaply and with almost no chance of failure) remains useful throughout the entire game.
But Thou Must!: You can actually accept an offer to stay and become the heir to your uncle's title rather than become a wizard... but the plot won't advance until you go back and tell him you've changed your mind, at which point it proceeds as if you'd refused originally.
False Flag Operation: Nash had the princess of the elves kidnapped and made it look like the Veranede tribe was responsible in order to get them on your side in the war... and ultimately just to make the Sword of Plot Advancement that he needs for his big plan.
Gondor Calls for Aid: Near the end, you have to go from kingdom to kingdom meeting with leaders to gather support.
Immortality Immorality: The mages at the mage guild immediately react with horror to the fact that Jerah would use his magic to seek something as crass as immortality. When you actually meet him, Lot instantly demands to know how many people died in order to let him live forever.
Mundane Solution: When the party opens the door to the tomb of Emperor Jerah, most of them panic on realizing that he's immortal. Lot calmly points out that they can just back away, slam the door, and lock it again before he can escape.
Optional Party Member: You can get the archmage-king of Selas and the and the king of your elves on your party near the end of the game, if you reject every other character when they're presented as options.
Required Party Member: The game pretends to give you the option not to bring Romal with you near the end, but even if you say 'no' to him, he'll force you to take him anyway.
First, there's Emperor Jerah. The player accidentally opens the tomb of the ancient, immortal undead king Jerah, which looks like this trope... and then Lot casually suggests that they just walk out, close the door again, and leave Jerah locked in his tomb. Later, an invading army releases him by mistake and gets brutally murdered when they attack him, but after that he doesn't really seem interested in doing anything beyond wandering the desert.
And then there's the entire Veranede Tribe, who may not have been so 'evil'.
So Long, and Thanks for All the Gear: Happens constantly, since for the vast majority of the game you have no control over your party, and people leave or join without warning. Not only do you have to buy gear for people, but spells as well, and spells can't be swapped between characters once they've been learned.