Plane of Torment is the tower crawl to flag Saryrn. The Keeper event is required for her Planar Projection.
Maareq respawns in 3 days. Saryrn 2 days and 18 hours. The Keeper of Sorrows returns in 2 hours and is in the open world. Trash respawns in 19 minutes 30 seconds.
Access
You need the Terris-Thule flag and the Bertoxxulous / Fuirstel chain finished. Hail Fahlia Shadyglade in Plane of Tranquility. Say condition, black cube, plane of torment, will go. Click the black cube over the reflecting pool.
Someone in the raid needs Screaming Sphere on their keyring or in their inventory to open the tower and to port with Tylis. A flagged player without one gets a hint. Kill the four Avatars for Orb of Agony, Orb of Anguish, Orb of Pain, and Orb of Suffering. Aggro Baraguj Szuul to port into his stomach. Drop down the floors to An Unimaginable Horror, kill it, then kill Baraguj (217k HP). The Horror respawns in 30 minutes. Loot Mouths of Baraguj Szuul and combine the four orbs.
Tower
One Screaming Sphere opens the door for the raid. Kill named on the way up: Salczek the Fleshgrinder, The Acolyte of Affliction, Ta`Grusch the Abomination.
Maareq the Prophet is in the last room before Saryrn. He is Permarooted and Slowable (60% mit). Keep the fight in his room. Minions spawn every 5 seconds. As they die he gains Rampage, then Flurry, then delay 8.
<Maareq the Prophet> - CH Chain: 4sec, 6sec slowed, Hits 1379, Dual Wield, Permarooted, Slowable (60% mit), Minions every 5s, Rampage then Flurry then delay 8 as minions die, 850k HP
Keeper
When Maareq dies, a zone emote announces Tylis Newleaf and his minions clean up. He becomes targetable in the cage. Everyone stand under the cage. Teleport radius is 250. A flagged person hails him, says will assist you, then we are ready or I am ready. The Screaming Sphere can be on a keyring or in inventory.
Do not fall into the water or mud.
Right staircase, next door on the right and up, then the door straight ahead. Ramp across into the final chamber. Kill The Keeper of Sorrows. He is Unslowable. AE Rampage. Hits 973. 100k HP.
Hail Tylis. He lasts 10 minutes and can give up to 72 flags. Hail first. Then one person says ready to return.
<The Keeper of Sorrows> - CH Chain: 2sec, Hits 973, AE Rampage, Dual Wield, Immune to Slow, 100k HP
Saryrn
Pull Saryrn in her chamber. She is Slowable (70% mit). AE Rampage. Dual Wield. Hits 573. Attack delay 10. 850k HP. Keep the fight in her room. Her health-reset timer stops when she is re-engaged. Leashing clears hate.
Casts Will of Saryrn (PBAE, 800 DD + 6s stun, Magic 0, 45s recast). Adds spawn at 99% and as she drops. Sorrowsong flies and sings from 99%. At 25% Sorrowsong becomes attackable. Kill it.
Hail the Planar Projection. It only answers the killer’s raid or group, lasts 10 minutes, and can give up to 72 flags. You need the Tylis flag for that hail. Then hail Fahlia Shadyglade in Plane of Tranquility.
<Saryrn> - CH Chain: 4sec, 6sec slowed, Hits 573, AE Rampage, Dual Wield, Slowable (70% mit), Casts: Will of Saryrn (PBAE, 800 DD + 6s stun, Magic 0, 45s recast), Sorrowsong at 99%/25%, 850k HP