Krystilia

Krystilia is a Slayer master found in Edgeville's jail north-east of the bank. When spoken to, she expresses her love for magic and the Wilderness, and claims the guards locked her in the cell for trouble-making.

Players can speak to her to change their respawn point to Edgeville for a one-time fee of 5,000,000 coins.

Slayer
She is a Slayer master who assigns the player monsters found within the Wilderness. Only kills within the Wilderness count towards her tasks. Before being assigned a Wilderness task, she will warn you that she will assign any monster regardless of your combat level.

Assignments from Krystilia have a separate task completion counter to standard assignments. Players will have to complete five Slayer assignments to begin earning Slayer reward points. Although Wilderness Slayer tasks are counted separate, players cannot have a regular and Wilderness slayer task at the same time.

Completion of a task assigned by Krystilia will grant:
 * 25 points per task
 * 125 for every 10th
 * 375 for every 50th
 * 625 for every 100th
 * 875 for every 250th
 * 1,250 for every 1,000th

Useful teleports

 * Edgeville - Fairy ring (code ), Amulet of glory, or Paddewwa Teleport
 * Edgeville Monastery - Combat bracelet
 * Corporeal Beast lair - Games necklace
 * The Forgotten Cemetery - Cemetery Teleport or Dareeyak Teleport
 * Burning amulet
 * Chaos Temple
 * Bandit Camp
 * Lava Maze
 * Graveyard of Shadows - Carrallangar Teleport
 * Demonic Ruins - Annakarl Teleport
 * Frozen Waste Plateau - Ice Plateau Teleport or Ghorrock Teleport
 * Fountain of Rune - Wilderness sword 4

Assignments

 * Out of all possible tasks, only Spiritual creatures require a Slayer level. In addition, the locations will only list those found within the Wilderness.

Monsters assigned by Krystilia have a chance to drop mysterious emblems and slayer's enchantments, which can be used to upgrade the Slayer's staff to a Slayer's staff (e).

Trivia

 * Prior to an update on 13 April 2017 that made Krystilia into a slayer master, she had no name, and was simply known as "Witch" in-game.
 * Despite the update newspost stating Krystilia will assign chaos druids, she does not actually assign them in game.