Ogogen

Main article: List of themes

Ogogen is a pet that can be adopted in the event When Dreams Were Young (Quest chain starts with Mooringlight).

In-Game Description

Hero walks beside a bustling being of rock, born and fallen from the black astral reaches. 

and

A vision of the rockling's past revealed its gray name: Ogogen. Expressionless, there is nevertheless something companionable in its bearing, its gaze, its helpful footprints.

Theme Upgrade

Main article: Starguide

Starguide: Celestial tiles grant +2 Warding and +1 Armor to heroes standing on them

Note: to use this ability, it must be selected as a theme upgrade upon hero promotion.

Specifics

(Passive) Celestial Path: When Hero leaves a tile, 40% chance to make the tile celestial and grant +10 accuracy to allies standing on it.