Law of NPC Relativity said:Characters can accomplish superhuman physical feats, defeat enemies with one hand tied behind their back and use incredible abilities -- until they join your party and you can control them. Then these wonderful powers all vanish, along with most of their hit points.
ROFLAbsolute Power Corrupts Absolutely said:If a good guy is manipulated to the side of evil, they will suddenly find a new inner strength that will enable them to wipe out your whole party with a wave of their hand.
Whenever somebody tells you about "the five ancient talismans" or "the nine legendary crystals" or whatever, you can be quite confident that Saving the World will require you to go out and find every last one of them.
FF2/4 anyone? XDDungeon Design 201 (or, The Interior Decorators Anticipated Your Out-Of-Body Experience)
Most dungeons will include "hidden" passages which are nearly impossible to see from a bird's-eye view, yet would be blaringly obvious from the party's perspective.
76. Magical Inequality Theorem
In the course of your travels you may find useful-sounding spells such as Petrify, Silence, and Instant Death. However, you will end up never using these spells in combat because a) all ordinary enemies can be killed with a few normal attacks, making fancy attacks unneccessary, b) all bosses and other stronger-than-average monsters are immune to those effects so there's no point in using them for long fights where they'd actually come in handy, and c) the spells usually don't work anyway.
77. Magical Inequality Corollary
When the enemy uses Petrify, Silence, Instant Death, et cetera spells on you, they will be effective 100% of the time.