Light creature (familiar)

Light creatures are level 88 Summoning familiars that grant a passive 50% chance to instantly convert harvested Divination memories outside of Prifddinas. It has a special move which grants a six-minute 'enlightened' buff, which gives you better rewards on the Hefin Agility Course, increases the instant memory conversion chance, and gives a 10% chance of getting double blue tears in Tears of Guthix. It can also teleport you to Tears of Guthix or to tormented demons in the Ancient Guthix Temple, if you've completed Tears of Guthix and While Guthix Sleeps, respectively.

Light creature pouch
A light creature pouch is made by using a Summoning pouch on a Summoning obelisk with 204 spirit shards, a blue charm and a Light core in the inventory. Making the pouch earns 771.6 experience points. Using the pouch to summon a Light creature gains 9 experience points, and costs 10 Summoning points. Each pouch summons a Light creature which stays alive for 60 minutes before needing to be re-summoned.

Dialogue
Light creatures can be talked to at 98 Summoning.