Larva

Opening of the battle against a Larva in the Monster Arena Calm Lands

HP: 1,498

Larvae are not particularly difficult to defeat, but you should take them out using magical attacks from Lulu, rather than attacks by the other party members. Larva is a Thunder-based element, so have Lulu use Water or Watera to take them out.

Ability Description
Sensor “Casts Thundara on itself to replenish HP and grow even more powerful.”
Scan “When HP is halved, it casts Thundara on itself to recover HP and increase magic power. Silence it with Silence Attack. It’s vulnerable to water, so Watera is the way to go.”

Steal:
Lunar Curtain (common)
Lunar Curtain (x2) (rare)

Drops:
Ability Sphere

Location

You can find them anywhere in the Thunder Plains.