Fire I:
- Cost: 3 MP
- Power multiplier: 4
- MDEF mitigation: 2
Fire II:
- Cost: 6 MP
- Power multiplier: 5
- MDEF mitigation: 2
- Other: double damage against plantoids
Fire III:
- Cost: 15 MP
- Power multiplier: 6
- MDEF mitigation: 2
- Other: double damage against plantoids
Fire I:
- Learnt for free from Charlotte in the Trademond Adventurers' Guild after the Spider Infestation quest (note that Charlotte will be in jail for some time if Aura did not spend the evening with her following the quest, however Charlotte can be bailed out by interacting with the jail guard). Requires MP ≥ 10. Training ends the day and takes up the next day.
- Learnt for free at the magic academy. Learning the spell this way ends 4 days and requires MP ≥ 10.
Fire II:
- Learnt at the magic academy for 1000 G. Learning the skill ends the current day and requires MATK ≥ 23 and MP ≥ 60.
- Learnt from Charlotte, once she reaches level 6 and Aura knows both Fire I and Heat Up I. Learning the skill ends 2 days and requires MATK ≥ 23 and MP ≥ 60
Fire III:
- Can be learnt in Pasciel's Elite club if you know Heat Up II and Flaming Robe II. The club is on the third floor and only opens after completing Reverse Summoning Ritual. Learning the skill ends 4 days and requires MATK ≥ 40 and MP ≥ 120.
Fire I is an almost essential skill for getting around the world by removing plant obstacles, including some that block off main-story-related areas. It can be done using Star Knightess but the Corruption increase makes this very costly. However, Aura doesn't necessarily have to be the one to cast Fire I; A fire-morphed Slime companion can cast it instead, and when Charlotte is in the party (during specific quests), she can be chosen to cast it.
Fire I be can chosen on New Game+ for 8 Score.