"Behold my true form, and despair!"Classic Big Bads have the tendency, when push comes to shove, to turn into big honking monsters. A Mad Scientist in a fit of urgency might down his own mutagen, or a cyborg turns his body into a living bomb, or a practitioner of Black Magic mutates himself into an Eldritch Abomination, or a mild-mannered enemy reveals her terrifying true form. Bets are good they'll become way more bloated, ugly, or plain disfigured. Sometimes this is more subtle, and the character will look perfectly normal (or even attractive) save for a few glaring monstrosities that give them a scary Game Face. This shows the villain means business and it's time for the heroes to end it. And for those with firmer morals, this qualifies the villain as a monster, making it fine to kill him. (See also Karmic Death.) This is probably why item 34 in the Evil Overlord List says "I will not turn into a snake. It never helps." Usually accompanied by the stock phrases "No one who has seen me in this form has lived to tell about it!!!", "I have only begun to fight!", or "Now you'll face my true power!" If there's one final final form after the heroes beat the bad guy, and it loses handily, it was a Clipped Wing Angel. Named in honor of Sephiroth, Big Bad of the video game Final Fantasy VII.note Video games in general absolutely adore having their final boss do this, even when their original form is scary enough anyway. In fact, it's gotten to be somewhat of an arms race: thanks to the popularity of Frieza in 1991, three-form bosses are now somewhat common, and those games going for "epic" will sometimes go for even more. In JRPGs, particularly, it is rather common to see two stages of One-Winged Angel: the "bizarro" form, that is huge and scary, and the "angel" form, that is winged, eerily beautiful and accompanied by Ominous Latin Chanting (the original One Winged Angel, Sephiroth, is the codifier of this subtrope). Once beaten, or on becoming even more powerful, the villain may cross the Bishonen Line and into safer territory for an Evil Makeover to work its magic (though it's a huge case of Tropes Are Not Bad; as much as it's used, you'd be hard pressed to complain when they turn into something completely awesome). Sometimes you never even fight their human form at all and they immediately turn into a monster. Can count as The Unfought if they showed fighting ability in their human form. This is more popular among minor video game villains who will often transform into tougher versions of earlier monsters like in the Breath of Fire and Final Fantasy games, as it takes time to create a unique battle sprite for them. Interestingly, heroes, particularly transforming characters, have been known to occasionally use this "turn into a big scary monster" tactic for their Super Modes as well. It's extremely rare for it not to cross into Superpowered Evil Side territory. Sadly, this transformation can often be anti-climactic, as it telegraphs to the audience that the villain will most likely face his final defeat soon. Outside of video games, it is quite rare for a bad guy to invoke this trope and actually WIN. This might be because the less human a character looks, the more "acceptable" it is to kill them. That being said, you may notice that it is generally a cliche that, whenever the Big Bad undergoes this transformation, they will almost always turn into a huge, sky-scraping Goliath. Rarely is this inverted mainly on the grounds that the biggest enemy is usually the most powerful and, in Western Culture, this is reinforced due to the aforementioned David versus Goliath story, as well as other tales of the small hero defeating the huge villain. Of course, when creators really want to throw their audience for a loop, they may follow Dragon Ball's example= the most powerful character is the smallest, and a massive size is, in fact, a sign that they have yet to reach their maximum potential. One way to defeat a villain who became giant is to create another giant to fight him with. A fight of giants can be even worse than a single giant, but it may be done anyway if there are no other options left. Scaled Up and Make My Monster Grow are major subtropes. See also Lovecraftian Superpower, Power-Upgrading Deformation, I Am Not Left-Handed, Evil Makes You Monstrous and Shapeshifter Showdown. Compare Emergency Transformation, Came Back Wrong, and Not Even Human. One subversion is to make it a Clipped Wing Angel. For those looking for actual winged people, see Winged Humanoid and Our Angels Are Different.
— Dracula, Castlevania: Symphony of the Night