10 Video Game Boss Transformations You Didn't See Coming
2. Lady Yunalesca - Final Fantasy X
Lady Yunalesca is unquestionably one of the toughest boss fights in Final Fantasy X, and while at first she's presented as a relatively familiar-looking humanoid woman - and this being Square Enix, she's of course wearing barely anything - she undergoes two drastic changes throughout the fight.
After defeating her first phase, Yunalesca assumes a more demonic form with tendrils emanating from her body and elevating her into the air. But things get truly queasy if you reach her third phase, where she'll be transformed beyond all recognition indeed.
At this point, Yunalesca reveals a Medusa-like creature attached to her body, comprised of a gigantic gorgon-esque face and snake-like locks of "hair," all while her original diminutive form chills out on a bed of hair above.
As if the mere difficulty of the fight wasn't enough, you've also got to take Yunalesca down while staring at her offputtingly grotesque transformation, which is nothing if not intensely demoralising.