Farm a named endgame boss material for the specific recipe or progression step that needs it.
PC / Global, full release with 2026 updates
WHERE & HOW TO FARM
Where to farm
The encounter that lists Tiaggro, the Eternal Guardian, as its boss. Confirm the mode and its reward conditions on the encounter selection screen.
Tiaggro, the Eternal Guardian, is identified as the source of Eternal Core. Treat this as a boss-specific reward run: first find the encounter that actually lists Tiaggro, then confirm its displayed reward conditions before committing to the attempt. The available material information establishes that powerful bosses can drop Void Essence, but it does not establish that a Void Fields Curse requirement applies to every Tiaggro encounter. Use the selected encounter’s own requirements as your guide. Before farming, check the crafting or progression screen so you know how much Eternal Core your goal needs. After a victory, verify the item in your inventory and apply it to that goal. Repeat while stock is short; do not count an unverified reward or assume another boss supplies the same item.
Unlock an encounter that explicitly features Tiaggro.
Check the selected encounter’s displayed conditions for the Eternal Core reward.
Bring a build able to clear the approach and defeat the boss.
Open the relevant crafting or progression screen and note the Eternal Core requirement.
Review available encounters and select one that names Tiaggro.
Read that encounter’s reward and difficulty conditions; apply only the conditions shown there.
Start the run and clear toward the boss while keeping enough health and damage for the fight.
When Tiaggro appears, avoid incoming attacks and deal damage during safe openings.
Defeat Tiaggro and collect the victory reward.
Return to the fortress and confirm the Eternal Core count in your inventory.
Use the Core for the recipe or progression step you identified.
Farming tips
Match both the boss name and reward conditions to the selected encounter; a general Void Essence gate does not prove a Tiaggro-specific requirement.
If the selected setup is unreliable, lower its difficulty where possible and build consistency before attempting a reward-gated version.
Repeat, collect and use
Repeat the Tiaggro encounter while the identified goal still needs Eternal Core. This is a repeatable boss farm; verify each reward and spend the Core through the relevant crafting or progression interface.
Common mistakes
Assuming the Void Fields Curse gate applies to every Tiaggro encounter: use the conditions displayed for the encounter you selected.
Entering a different boss fight: confirm Tiaggro is named before starting.
Continuing after the requirement is met: check the next recipe or progression bottleneck and redirect the farm.
When to stop or switch
Stop when your intended recipe or progression step has enough Eternal Core, or switch if another material is now the missing requirement.
