Mera Mera No Mi

The Mera-Mera no Mi (Flare-Flare Fruit) is a Logia-type Demon Fruit that allows its eater to manipulate, produce, and turn into Fire.

Pros

 * Very large AoE attacks
 * All attacks inflict a Burning DoT effect
 * Very strong high AoE "ultimate" technique

Cons

 * Extremely stamina-intensive
 * Mediocre damage output on most techniques
 * Literally has 3 useful moves