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Forbidden Fire, Forbidden Earth II Challenge › Other		Challenge Log Patch 4.3
	Defeat 60 fire- or earth-aspected enemies no more than two elemental levels below your own.	0/60
Elemental Experience Points Gil 107,960 (elvl 20) → 410,213 (elvl 34) 1,000

Notes
While raw amount of bonus increases from 107,960 to 410,213 as Elemental level increases, the percent decreases from approximately 34% down to 6%.