Tibault’s Will is generally not tied to one specific lair boss anymore; it’s in the general unique pool , so it can drop from any lair boss and other endgame loot sources rather than being target-farmed from a single boss.

What that means

  • You should farm lair bosses for volume, not for a guaranteed Tibault’s Will drop.
  • Community guides and recent loot-table roundups also describe it as a generic unique rather than a boss-specific unique.
  • Older guides may still mention Uber Duriel as a source, but that reflects earlier drop-table rules and not the current general-pool behavior.

Practical takeaway

If you want Tibault’s Will fast, the best approach is to:

  1. Run the lair bosses you can clear quickly.
  2. Prioritize high-tier endgame farming for more unique drops.
  3. Use any item-crafting or unique-targeting systems available in the current season if your goal is specifically pants.

Tibault’s Will is therefore better described today as a random unique drop , not a drop from one named lair boss.