To defeat the boss, players must first kill all Red Veil Fanatics on the field, after which up to three of the chains holding the Warframe will turn blue, allowing the Operator to destroy them with their Void Beam.

Why can't I do chains of Harrow?

Do note that the Chains of Harrow quest can only be played solo, but before you can start, you must complete the “The War Within” cinematic quest and “Mot Survival Mode” on the Void via Sedna. The quest will automatically be available from your quests section via Codex once completed.

Is Harrow a good Warframe?

What Makes Harrow Good? Harrow is great for protecting his team and amplifying their weapons' damage into the stratosphere. A skilled Harrow can lock down entire maps while simultaneously providing himself and his team with massive buffs to reload speed, fire rate, critical chance, shields, and best of all, energy.