The Gates of Arah is the highest level dungeon in Guild Wars 2, and the entire premise is seiging Arah, where Zhaitan built his stronghold. Together with Destiny's Edge, now reunited (see also: every other dungeon in the game), you board an airship and fly into the ruined city. Above is pictured the Humble, Destiny's Edge's own airship. On board the humble, you slay three of Zhaitan's champions; Ogravos the Moonslayer , and together Fafnarin the Heartslayer and Horrogos the Soulbreaker. You do this by firing at them from those cannons there. Those cannons then break.
Don't worry, there's a bigger airship.
|You're gonna need a bigger airship.|
Fighting Zhaitan happens in a couple stages. First, you must defend Zojja while she repairs the giant fuckoff cannon. Once it fires, it sheers off Zhaitan's tails. He then promptly smashes the cannon. And the front end of the airship.
|He's kinda pissed off.|