Aestas is also a cat like goddess you'll get fire and cat themed spells

The Flames of the cat

Aestas grants you the spells you will need in your quests

Fires of gods

Due to working for Aestas and fire or ice won't hurt you and when you land obsidian mounds foam around you in a 5 foot square and take half fall damage and at lv 12 you take no fall damage

Obsidian skin and lava shape

Due to being one with Aestas your skin has become obsidian and you can become lava when you have no armor add dex mod to your AC

obsidian being

you become a being made of obsidian and with crakes of magma throw your skin and when hit with any melee attack they take 1d6 fire damage + your str stat and you are able to speak the language of Aestas now but Acid, piercing attacks are dealy to you know but you don't need to eat, don't get deafened but water deals 4d6 acid damage to you 

Flame blessing

all damage you do does 1d4 extra fire damage