Crimson ichor for Havenhythe ability codices

Ghrazi Blood Knights in the Crimson Throne and Sanguine creatures around Havenhythe.

Before you go

Choose a codex goal: Sanguine Offering, Vampyric Slayer or Vital Drain.
Decide whether you will farm Sanguine creatures or attempt the duo boss.
For creature farming, select a local enemy suited to your combat level and gear.
For boss farming, enter the Crimson Throne with a partner after quest unlock.
Collect Crimson Ichor and retain remnant energy toward the planned codex.
Check your actual currency totals before committing to more kills.
When you have the needed materials, use them toward the selected codex.

For the Blood Knights, collect loot from beneath the knight you dealt the most damage to. Loot is forfeited when the instance collapses with no players inside; do not leave before collecting it.
Use creature farming when you want a less coordinated route; reserve the boss for a prepared duo.

Repeat your chosen combat route until the material requirement for the codex is met; do not assume a fixed number of encounters.

Farming without a codex target: choose the unlock first and track both required currencies.
Treating all routes as equal risk: the boss requires a partner and endgame readiness.
Leaving boss loot behind: collect it before the instance empties.

Stop once you can obtain your chosen codex or switch between boss and creatures when your group or supplies are no longer suitable.

Sources & fact checks

Open a guide to find other locations and see what the item is used for.

Sanguine combat and boss drops

Collect Crimson Ichor alongside remnant energy for the Sanguine Offering, Vampyric Slayer and Vital Drain codices.