Raid Mode is still a separate boss route
The public raid page still treats Raid Mode as its own building, portal flow, raid-shop loop, and craftable-card grind instead of folding it into Underworld Invasion.
Raid Coins and boss drops drive the grind
The near-official raid guide still centers Raid Coins, boss-specific crafting drops, and craftable card unlock rows such as Eternal Dragon, Shadow Dragon, Sword Deity, Cifer, Monster 9, True Hero, Archangel Deity, Awakened Golden Wind, and Awakened Wizard King.
Difficulty ladders change boss prep
The public raid page keeps Easy, Medium, Hard, and Extreme ladders visible, with harder modes adding stat multipliers, first-turn pressure, and boss-specific restrictions.