Heroic Ring

The Heroic Ring (2981) can be purchased with 30 Token Of Hero (6684) by the NPC Hero Token Exchanger.
(moro_cav 32, 73)

The Heroic Ring (2981) can be enchanted and reset enchantments with Token Of Hero (6684) by the NPC Expert Enchanter Byrnes.
(moro_cav 34, 65)

Heroic Ring Enchantment

There are 4 slots available to enchant, Byrnes will ask you what kind of enchant category you want for each slot.
Once chosen, Byrnes will give a random enchant from the desired category.
To reset the enchant, you need to give him 3 Token Of Hero (6684) .
Be careful since resetting means wiping ALL ENCHANT SLOTS.
Below is the enchant category available for each slot and each respective enchants:

Slot 1		Slot 2		Slot 3						Slot 4
Stats	Random Enchant	Stats	Random Enchant	Stats	Random Enchant					Stats	Random Enchant
STR	+1~+5	ATK	+1%~+5%	MAX HP	+1%~+5%					DEF	+3	+6	+9	+12	+15
INT	+1~+5	MATK	+1%~+5%	MAX SP	+25	+50	+75	+100	+150	MDEF	+1	+2	+3	+4	+5
AGI	+1~+5
VIT	+1~+5
DEX	+1~+5
LUK	+1~+5