Trial: Defeat a set number of experience-yielding monsters under the prescribed weather conditions, or on the corresponding day of the week.
Objective: 150 experience-yielding elemental-type creatures.
Equipment: Teiwaz: 1700 must be equipped.
Location: Yagudo's Elemental in Meriphataud Mountains (S) (2 SMN spawns right in front of Castle Oztroja [S]). Another great place would be elementals in sky (Avoiding Dark/Thunder/Earth). Also just noticed, killing Farfadets in Abyssea - La Theine on lights day also counted towards elemental kill count, even though they are pixies..