The Four Serpent Houses

The Four Serpent Houses is the Phantom Blade Zero quest, and by Game8's list the chapter after The Heart's Trail, that opens Mirage Estate: take the Tongue and half the Loong Emblem from the Red Serpent House, the Fang and the other half from the Black, the Eye from the White past Heartpiercer, and set all three in the Green Serpent House door.

Three pieces open the serpent door to Mirage Estate: the Red Serpent Tongue, the Black Serpent Fang and the White Serpent Eye, set in the bronze serpent head of the Green Serpent House in Pangzhen. Burn the vines with the Flaming Mane to take the Tongue and the Fang, with the two halves of the Loong Emblem, then open the White Serpent House with the joined emblem for the Eye, AllThings.how's guide says. The lock is where many players stop: on Nov 9, 2026, 32.3% of Steam players held "A World Gone Hollow", the achievement for solving the Serpent Head Lock, against 51.0% who had reached the Order's Tavern earlier in Pangzhen and 24.2% who had passed through Mirage Estate beyond it. Stop before you walk through that door: entering Mirage Estate closes the True Ending's quests (Endings).

ConCon's Nov 1, 2026 guide ends at the door itself: at 6:28 Soul stands before a bronze serpent head mounted on a painted door, the subtitle reads "This door should lead to the back of the Mirage Estate...", and the door then swings open onto a red-lit stair.

Game8 lists the quest as Chapter 8, the chapter after The Heart's Trail, and by Nov 13, 2026 it had a walkthrough for it and for the chapter the door opens, The Way Forward; AllThings.how files the serpent door under The Heart's Trail itself. The one boss on the way is Heartpiercer, Elite Shadow Warden, at the White Serpent House.

Two things to have first

By AllThings.how's account, the Flaming Mane burns the thorny vines that block the Red and Black houses; AllThings.how says Lei Dang restores it from the Dormant Flaming Mane that the Lion Dance Grandmaster drops, and that it works with the interact key at a vine "equipped or not". The Sha-Chi Powered Boat carries Soul across Meigu Lake to the White Serpent House.

1. Read the letter at the Green Serpent House

The quest is logged when Soul touches the snake statue wall at the Green Serpent House during The Heart's Trail (Game8). The letter "The Order: The Four Serpent Houses" lies on the candlelit altar on the house's upper floor: go round to the yard on the far side (three doll enemies), climb to the terrace, take the stair on the roof and enter through the opening (AllThings.how).

2. The Red Serpent House, Crimson Forest

Burn the vine across the shed doorway, go through the shed and open the double gate. The Loong Emblem's yin half is in a jade box in the manor study, and the Red Serpent Tongue on a carved side table in the curtained room beside it, about 40 m from the Red Serpent House bell. That bell is the one Soul rings in the Crimson Forest during Snake's Reflection.

3. The Black Serpent House, Village of Lu

Village Auntie giants guard the bell yard, and pulling one brings the rest. Burn the vine across the stone stairs and climb into the house: the yang half of the Loong Emblem sits on a low chest in the study lined with drawers, and the Black Serpent Fang in an open box on the carved counter in the next room, about 50 m from the bell. The Red and Black houses can be done in either order, and the two halves join into the Loong Emblem "the moment you pick up the second half". The village is the one of Heartless Remnants.

4. The White Serpent House, Meigu Lake

Sail to the White Serpent House Dock and ring its bell. Two White Shadow Wardens hold the front hall's roof and another the approach; ring the White Serpent House bell, your respawn point, and open the lattice double door with the Loong Emblem (AllThings.how). In the courtyard beyond is Heartpiercer, who must fall before you go on; he drops the Sundering Dual Axes. The White Serpent Eye lies on a long carved desk in the room past him, about 60 m from the bell.

5. The Green Serpent House door

Before you go on, finish the True Ending's quests: the list is on Endings, and PowerPyx warns that entering Mirage Estate ends them. Then return to the Green Serpent House bell and walk about 30 m to the green altar hall. Use the bronze serpent head on the painted double door and set the Tongue, Fang and Eye in any order. The third opens the door onto a red-lit stair down to Mirage Estate.

Piece (AllThings.how)	House	Region	Distance from the house's bell
Red Serpent Tongue, Loong Emblem (yin)	Red	Crimson Forest	About 40 m
Black Serpent Fang, Loong Emblem (yang)	Black	Village of Lu	About 50 m
White Serpent Eye	White	Meigu Lake	About 60 m, past Heartpiercer

Past the door, Game8's list has two chapters left, The Way Forward and A Soul's Worth, which close the story (Walkthrough).

Frequently asked questions

Where are the Serpent Eye, Tongue and Fang in Phantom Blade Zero? The Tongue is in the Red Serpent House (Crimson Forest), the Fang in the Black Serpent House (Village of Lu), and the Eye in the White Serpent House on Meigu Lake, past Heartpiercer, AllThings.how says. The Red and Black houses can be done in either order, but the White one stays shut until both halves of the Loong Emblem are in hand.

How do you burn the vines in Phantom Blade Zero? With the Flaming Mane, at the vine with the interact key, equipped or not; AllThings.how says Lei Dang restores it from the Dormant Flaming Mane the Lion Dance Grandmaster drops.

Where does the Green Serpent House door lead? To Mirage Estate, down a red-lit stair once the Tongue, Fang and Eye are set in the bronze serpent head. Finish the True Ending's quests before you enter, because walking in ends them; fewer than a quarter of Steam players (24.2% on Nov 9, 2026) had passed through Mirage Estate by then.