PoE Ethereal Knives of the Massacre transfigured

Ethereal Knives of the Massacre. Spell, Projectile, Physical. Level: 1–20. Cast Time: 0.75 sec. Critical Strike Chance: 6.00%. Effectiveness of Added Damage: 220%. Requires Level 1 Fires a circle of knives around the caster which deal physical damage. Deals (7–949) to (10–1423) Physical Damage Fires (12–16) Projectiles Fires Projectiles in a circle Additional Effects From Quality: Fires +(0–3) Projectiles Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.

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Alternate quality gems, labyrinth helmet enchantments and unique threshold jewels are all systems that were trying to subtly modify the behaviour of skills. With this expansion these have been combined into a new system called Transfigured Gems that allows us to fully achieve the goal of these three systems, and then some.
Transfigured Gems are alternate versions of existing skill gems that have different functionality and balance than their regular versions. We have added many of these, with interesting variations that drastically change how existing skills play.
Some existing skill gems have had stats or interactions removed from the base gem and moved to the Transfigured versions to provide more focused support for pre-existing alternate playstyles.
The Divine Font at the end of the Labyrinth is now a gem crafting device that can modify your skill and support gems by turning them into Transfigured Gems, add Quality or Experience to Gems, or sacrifice a Gem for one or more Treasure Keys to open Izaro's Chests.