Void spinner

The Void spinner is a Summoning familiar, introduced with the "Summoning 2" update on 31 March 2008. It requires level 34 Summoning. It is the lowest-level healer familiar available, far below the Bunyip available at level 68 and the Unicorn Stallion at 88.

To make a Void Spinner pouch you need to use an empty pouch, a Blue Charm, a Spinner Charm, and 74 shards on an Obelisk.

Healing
The void spinner will automatically heal 10 life points approximately every 15 seconds up to a player's maximum health. Note that the healing ability still works even if a player does not have any remaining Summoning points.

The healing effect makes the Void Spinner useful in single combat environments as it can restore up to 1080 life points over its summoning duration of 27 minutes. This is equivalent to 9 cooked lobsters, although a player could heal much more LP for the same cost by buying the lobsters rather than investing in a spinner familiar. Therefore, its best application is for when you need healing but also need inventory space for things like monster drops.

Although the Bunyip has a better healing rate than the Void Spinner, the Void Spinner can be useful for the player who doesn't have 68 Summoning.

Pouch
Void Spinner Pouch is made by using a Summoning pouch on a Summoning obelisk with 74 spirit shards, a blue charm and a Void Spinner Charm in the inventory. Making the pouch earns 59.6 experience points.

Call To Arms
Call To Arms is a special move for all of the void summoning familiars. When activated it will teleport players to the Void Knight Outpost.

Trivia

 * The void spinner seems to be based upon the Portuguese Man o' War, a type of poisonous jellyfish-like siphonophore.
 * The void spinner's special ability is similar to that of its counterpart seen in Pest Control, which heals the portals.
 * The void spinner seems the be based off the Dragon Quest character "HealSlime", both being jellyfish like and having healing powers.