Teleport you to the Void Knight Outpost if your life points drops below 10%, similar to a ring of life.
Special teleports you to Pest Control Landers.
Notes:
Crafted at a summoning obelisk from a blue charm, summoning pouch, 74 shards, and a shifter charm purchased with Pest Control Points. This grants 59.6 xp. Summoning a Void Shifter familiar drains 4 summoning points.