Crystalline shapeshifters are Slayer monsters located on Tarddiad after completion of the quest The Light Within. They can fight with all three combat styles, and similair to the Revenants they will switch dependant on the combat style you are using. Crystalline Shapeshifters are more dangerous than their combat level suggests and shouldn't be taken lightly if fought for the first time. They inherit several combat abilities such as stuns and damage-over-time abilities, but as well host a set of unique abilities.
Crystaline shapeshifters switch their combat styles dependant on both the weapon you are using, and any protective prayer you are using, finding the best style to use. For example, if a player uses Magic weapons, it will switch to Ranged. But if the player has Protect/Deflect Missles prayer in use, the Crystaline shapeshifter will switch into Magic.
Crystaline shapeshifters have two unique abilities:
They can remove / interrupt any damage-over-time, stun and bind debuffs applied to them. Combo attacks however will not be interrupted, unless the player is stunned.
When they are in Ranged or Magic phase, they can turn into a crystal spiked ball and lunge at the player for extreme Melee damage, spiking up into nearly 6.000 Lifepoints.
Crystalline Shapeshifters during the quest only give their 100% drop.