Lets play a game of Tropes

[windikite]

Right off of TV Tropes,
1. press the random button. This is your mandatory trope.
2. Look through any other tropes you may like, and find the most unusual and gripping combo that flips your jimmies.
3. Talk about it here, specifically if you can form some character or story concept with it.

I will go first.
Evil Plan:Doesn't need much explaining does it?
I will choose Clingy MacGuffin! It's a device the character wants to be rid of no matter what, but it's impossible!
The character is acting out an evil plan, but it's not his; it's his *****. He tries to stop it but he only brings it closer to fruition.

Your go.

[Cielle]

1. Pointless Doomsday Device: a super-weapon with the potential to destroy entire planets that exists for absolutely no reason and usually a) appears to be something harmless or b) is easily activated.
2. Laser-guided amnesia: a convenient plot device which usually involves the victim forgetting everything about their identity/past. Usually they amnesiac will remember basic facts, as well as retaining latent abilities/muscle memory stuff, but they don't know why they can do it or where they learned it.
3. Story concept: the heroes defeat and evil-doer before he/she/they can activate the doomsday device. How? They use laser-guided technology to make the villain forget about their plan and evil ways! The problem? The heroes don't know what the doomsday device is, only that it is cleverly disguised and is semi-activated, ready to go off with the mere touch of a button.

[windikite]

I love this, the evildoer is left harmless for the moment, but the heroes don't exactly know what the device is or where it is. Some damn adventurer could make the entire conclusion pointless and no one would know since they all exploded.