Dia2

Type White Magic
Level 3
Effect Inflicts 40-160 damage on undead foes.
Power 80
Hit Rate 96%
Target All foes
Price 1,500 gil
Sold In Elfheim
Cast By Items Light Axe

Learned By

WM
RM
BM
Kn
WW
RW
BW
Ni
Dia2 is a nice Spell against Undead, almost as powerful as Fire2. Either Spell will clear out most hordes of Undead quite nicely. The only problem with Dia2, as with all Dia Spells, is that it shares a Spell level with the Cure Spells, so you may not want to cast it too much. Dia2 is usually worth it, though, especially considering the relatively minor healing of Cure2 and Heal1. As with all the Dia Spells, only a White Mage can cast it, though late in the game you will find not one but two Light Axes that let anyone cast Dia2 for free.
Compare Dia2 to other Spells
Shops: Where Dia2 is sold – 1 shown
Map Shop
Elfheim L3 Wh.Magic
Weapons: Which can cast Dia2 – 1 shown
Rare weapons can only be found as treasure, not purchased; enchanted items cast spells when used in combat; legendary weapons can be earned via sidequest; ultimate weapons are uniquely powerful treasures
Name
The base damage dealt by the weapon; this is added to half of the wielder's strength score, and each hit deals between one and two times this total in damage, reduced by the target's defense
Damage
This value is added to the wielder's base accuracy to determine the overall accuracy of the weapon's attacks; the base chance to hit is approximately 84% plus half of this value, modified by the target's evasion; a character gains an extra hit for every 32 points of accuracy they have
Hit Rate
The chance of each attack with this weapon being a critical hit (unless the attack misses); critical hits add double the character's attack rating to their normal damage (this extra damage ignores defense)
Crit
When used against a monster weak against one of its elements, the weapon gets a +4 bonus to attack and is 20% more likely to hit
Element
When used against a monster of a family it is effective against, the weapon gets a +4 bonus to attack and is 20% more likely to hit
Effective Against		 Price
The amount of gil received when selling this weapon in a shop
Value
If used as an item in combat, some weapons can cast a particular magic spell free of cost
Spell		 Equipped By
Light Axe 28 +15 14.9% - Undead - 5,000 gil Dia2 Wa, Kn, Ni
Cure2 Heal1

Related

Dia1

Type White Magic
Level 1
Effect Inflicts 20-80 damage on undead foes.
Power 40
Hit Rate 96%
Target All foes
Price 100 gil
Sold In Cornelia

Learned By

WM
RM
BM
Kn
WW
RW
BW
Ni
The Dia Spells all do decent damage to all Undead Monsters, and no damage to anyone else. Because they are so limited, they generally do a lot of damage—Dia1 does as much damage as Ice1, a level 2 Black Magic Spell, but does it to multiple targets at level 1. Don't believe the bestiary when it tells you Undead are "Weak" to Dia Spells, though—this just means they're affected by them at all. Dia's damage is actually non-elemental, which means no Undead is weak to it, but no Undead resists it, either.

Dia3

Type White Magic
Level 5
Effect Inflicts 60-240 damage on undead foes.
Power 120
Hit Rate 96%
Target All foes
Price 8,000 gil
Sold In Melmond

Learned By

WM
RM
BM
Kn
WW
RW
BW
Ni
Dia3 is a powerful Undead killer, and it is available shortly before the Undead-filled Terra Cavern. It is a very powerful Spell, but unfortunately shares its level with the Life1 Spell. Don't waste all your level 5 Spell slots killing Undead, but don't be afraid to use Dia3 in a pinch.

Dia4

Type White Magic
Level 7
Effect Inflicts 80-320 damage on undead foes.
Power 160
Hit Rate 107%
Target All foes
Price 45,000 gil
Sold In Gaia

Learned By

WM
RM
BM
Kn
WW
RW
BW
Ni
Dia4 dishes out a whole lot of damage—just as much as Holy, in fact—but the problem is that there just aren't that many high-HP Undead to use it on. It can be a fun Spell to really put the hurt on Undead, but it's never worth wasting a Spell slot that could be used for Cure4 instead. This is one Dia Spell you can safely pass on.

HRM2

Sprite
Power 80 Hit % 96%
Type White Magic LV 3
Effect Deals 80-160 non-elemental damage to all Undead foes
Target All foes

Learned by

WM
RM
BM
Kn
WW
RW
BW
Ni
Sold In ElfLand (1,500 G)
Cast By Items Light Axe
HRM2 is a nice Spell against Undead, but it is outclassed by FIR2. HRM2 is most effective against Undead with lower HP totals, including most of those that inflict Paralysis. The problem with HRM2, as with all HARM Spells, is that it shares a Spell level with the CURE Spells, so you may not want to cast it too much. HRM2 is usually worth it, though, especially considering the relatively minor healing of CUR2 and HEAL. As with all the HARM Spells, only a Wh.MAGE can cast it, though late in the game you will find not one but two Light Axes that let anyone cast HRM2 for free.