The Secrets of Suramgamin

From Shyka's location north of the southern entrance, head west to find three Poisonous Giant Flytraps. Defeat them.

Continue west, looting a stone along the northern wall for an Ancient Elven Bead (Perception 11).

Turn north and climb vines (Mobility 29) to reach a ruined tower. Disarm a trap (Perception 36, Trickery 36) and loot a chest for restorative scrolls and another Ancient Elven Bead.

Climb down and head south uphill to find Kamala the Phoenix, a Satyr, and a Nymph. Loot rocks to the west for a Tree Crest Buckle.

Interact with Kamala. Passing a Lore (Religion) 25 check reveals they are devoted to a goodly sect.

To begin Kamala's trial, respond with “What does this trial consist of?” then “I agree to undergo your trial.”

Pass a Diplomacy 30, Bluff 30, or Intimidate 20 check. The Intimidate check is also Neutral Evil.

If you chose Diplomacy or Bluff, you will face another check: Diplomacy 32, Bluff 27, or Intimidate 20 to dismiss the fey.

If you pass the fey dismissal check, you must pass a Will 30 check to resist the Satyr's pipes. Do not attack the fey to complete the trial.

Talk to Kamala again. She will invite you to meet Visaka the Unicorn at the Temple of the Elk. Exhaust her dialogue options.

Travel to the Temple of the Elk. Ignore pilgrims and head northwest past the fountain and ruined wall to find Visaka the Unicorn, who is surrounded by an Immense Mandragora, a Poisonous Primal Manticore, and a Poisonous Primal Hydra.

Ask Visaka about the trial. He explains you must deal with the beasts without killing them. Accept the challenge.

To survive Visaka's trial, use spells like Phantasmal Web or Hold Monster on the manticore and hydra due to their poor Will Saves. This will remove their poison and attacks.

Tank the Immense Mandragora while using defensive spells like Stoneskin on yourself.