Lore
The true power of flame is revealed in the core of bright, destructive fires that rack the evergreen forests, the simmering airwaves of the driest deserts, and in the hands of the Ignis users. 
Abilities
Ignis is an Aspect type from the Pyro aspect with the following abilities:
Heat Affinity (Positive)
You get a decent attack boost in hot biomes.
+0.4 attack damage in hot biomes
Heated Strength (Positive)
Being on fire grants you an attack damage bonus.
+3 generic damage when on fire
Ignition [Quaternary]
Using your primary active ability, you can light yourself on fire for a short duration, granting you an attack buff with your [Quaternary] key.
Ring of Fire [Quinary]
As your secondary ability, you can light entities around you on fire for a few seconds with your [Quinary] key.