The TVTropes Trope Finder is where you can come to ask questions like "Do we have this one?" and "What's the trope about...?" Trying to rediscover a long lost show or other medium but need a little help? Head to Media Finder and try your luck there. Want to propose a new trope? You should be over at You Know, That Thing Where.
That's definitely in the spirit of it, but that trope seems more like it's for specific decisions. Maybe an example would help:
-turn-based RPG battle
-player's characters have the options of "Attack, Magic, Item, Defend"
-boss says "BY MY LORD'S NAME, MAGIC IS FORBIDDEN."
-player does not use any magic that turn
-nothing happens
-next turn the boss says "BY MY LORD'S NAME, ITEMS ARE FORBIDDEN"
-one of the characters uses a Mana Meter-restoring item
-the character that used the item promptly explodes for 9999 damage
Think Are You Sure You Want to Do That? except weaponized. It's like a weird combination of that trope, Barrier Change Boss, and Interface Screw that doesn't quite fit into any of the three, and it's something I've seen used frequently enough in RPGs that it should probably have an entry.
Edited by SLthePyro
Basically, during a Boss Battle (video game or otherwise, I'm sure examples exist in other media), the boss imposes a "commandment" of sorts that warns the player against performing certain actions as part of the battle gimmick. This is not a Barrier Change Boss that alters its own mechanics, or an Interface Screw that jumbles up the menu. The boss itself and the interface remain unaltered and player is allowed to do the thing it does not want you to do — but there will be consequences for it that the player and their character(s) will not appreciate, sometimes making doing the thing a direct path to the Game Over screen, or other times giving the player a choice between embracing the consequences or playing it safe.
This is a trope that I thought existed, but cannot find for the life of me, and I'm beginning to notice a void in some descriptions being bandaged by Barrier Change Boss and Interface Screw that could easily be filled with a trope like this. Does it exist and I simply haven't found it? Or is this a trope I'm going to have to launch?