Unlocking and beating the Knave boss fight in can grant you important rewards for some characters, in addition to being one of the best encounters in the game. The Knave is the boss form of Arlecchino, the Fatui Harbinger that was first introduced as an NPC and was then added as a new playable character in 4.6. While Arlecchino is a ruthless and powerful DPS unit, she gets even more powerful in her boss form – this is quite similar to Raiden Shogun as a character versus her boss form in the region of Inazuma.
Contrary to the Electro Archon, however, Arlecchino’s boss form is not located in Inazuma and, instead, can be found in Fontaine. There are a few prerequisites to unlock it and, once that is done, beating her will require an extra ounce of dedication. The Knave is a tough boss fight and, if you don’t play your cards correctly, she can one-shot your characters with some easy. There is a way of avoiding that, but you will be put to the test against this boss in . Hopefully, a solid team comp can aid you in your quest.
Ultimately, there are two ways of unlocking the Knave boss fight. The first of them is through natural progression within Arlecchino’s dedicated Character Quest called Ignis Purgatorius Chapter. To start, you will have to have completed the main Archon Quests in the region of Fontaine and be at Adventure Rank 40. Unlocking the quest also requires a Story Key. You will have to go through the main story in this new quest with Arlecchino and, near the end, you will face her in the campaign.
Once you beat her in the story, you can challenge the Knave as a weekly boss fight for rewards, such as some of Arlecchino’s materials in .
The second method of unlocking the Knave boss fight is through the quick-start feature, a quality-of-life optimization added by HoYoverse some patches ago. With it, you can unlock the boss fight without having to go through the quest. This was made to allow you to farm for her materials before concluding the mission. To take
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