The Fire patron

you become a real fire god 

all fire spells

you learn all fire spells  

fire proof

you become immune to fire damage  

fire teleport

teleport anywhere but only you can use this ability  

blue fire protection

turns all fire blue and increases your AC by 4 

last stand

at half hp you can explode doing 5d12 damage to yourself but doing 7d12 damage to anything in a 1500 mile radius