Abaddon is the first boss fight you have in Stellar Blade. You meet this boss on top of the Parking Tower during Scavenger Adam, when you are still on your way to the Hall of Records. Abbadon is a large horned beast that wields two fearsome swords.

When you appear on the roof of the Parking Tower, Abaddon introduces himself by throwing a car at you. After a quick, bullet-time-tastic cutscene, it’s time for the fight to begin. There’s no specific trick or technique to defeating Abaddon, but it’s by far the toughest fight you’ll have in Stellar Blade so far. And you’ll have to make use of a variety of combat techniques you’ve unlocked, but perhaps not practiced as much as you should have.

This boss fight is Stellar Blade's way of letting you know that you really need to learn how to block and parry effectively in this game. I'd gotten through most of the combat up until this point by more or less mashing buttons. But that's not enough against Abaddon, and I got my shiny, tight ass kicked a few times before I started learning how to properly parry and dodge.

All of Abaddon's attacks are large, slow, and powerful, making it seem like they're all unblockable. However, resist the urge to dodge unless you see the telltale yellow or blue circle warning you of an unblockable attack. Parrying is effective against all of Abaddon's other attacks, and you don't have to get a Perfect Parry every time (whereas you'll often get hit if you only manage an imperfect dodge).