Final Fantasy: 15 Most Brutally Difficult Boss Battles

15. Yiazmat - Final Fantasy XII

I hope you're in it for the long haul with this one.

Yiazmat, the ultimate Elite Mark as part of Final Fantasy XII's long, elaborate and altogether very fun hunting sidequest, takes at best an hour to complete.

An entire hour. At least. That's if you're at a really high level, have your gambits set up almost perfectly and are really good at Final Fantasy XII. It'll probably take you closer to 2 hours, or more.

Yiazmat takes so long because he's got over 50 MILLION hit points. He's got so much HP, he has 50 different HP bars, each made up of a million points each. So every time you wittle one down? There's another bar right there to ruin your day.

When you add in a load of other tricks such as a constant 5% chance of Yiazmat killing you instantly, him buffing his defense when he's at half health so the max damage you can do is 6,999 and the ability to kill even your strongest character in around two hits, this guy is absolutely no joke.

Beating Yiazmat nets you 30,000 gil and the Godslayer's Badge, which you'll need along with other maguffins to unlock the Wyrmhero blade, one of FFXII's strongest weapons.