Group Progression

Progression in House of Thule is purely mission based. You start out with access to Tiers 1 and 2, to access tier 3 you need to complete:

• Feerrott - Fall of the Tae Ew
• House of Thule - Welcome to My Nightmare
• Grounds - The Gardner
• Well - No Freedom in Death
• Library - The Stuff of Dreams
• Erudin Burning - The Illuminating Truth

Each mission has its own requirement to get, but all that is needed for progression is the missions. You can check what you need in game on the Achievement "It's Dangerous to Go Alone (group)".

Access to tier 3 gives you free run of Upper Floors, Fear Itself, Al'Kabor's Nightmare, and Miragul's Nightmare. To access tier 4 you need to complete the missions in each of those zones:

• House of Thule upper - Redemtion
• Al'Kabor's Nightmare - Catastrophic Power
• Miragul's Nightmare - Miragul's Vendetta
• Fear Itself - An Offering to Thule

Each mission has its own requirement to get, but all that is needed for progression is the missions. You can check what you need in game on the Achievement "Have Fun Storming the Castle (group)".

This gives you access to the two tier 4 zones, Morell's Castle and Sanctum Somnium. There are missions here to complete the expansion lore and unlock raids, but not required for just grouping.