|Great Sword weapon skill|
|Skill Level:||N/A (Rune Fencers only)|
|Quest:||Rune Fencing the Night Away|
|Description:||Delivers a twofold attack. Damage varies with TP. Aftermath (Epeolatry only): Increases accuracy and attack, occasionally attacks twice or thrice.|
|Equipment:||Aligned with thunder equipment (Thunder Gorget & Thunder Belt).|
|Aligned with breeze equipment (Breeze Gorget & Breeze Belt).|
- Dimidiation can be used without completing Rune Fencing the Night Away if the Ergon Weapon Epeolatry is equipped.
|Damage Multipliers by TP:|
|1000 TP||2000 TP||3000 TP|
- Dimidiation is only available to level 99 Rune Fencers.
- In heraldry, dimidiation is a method of marshalling (heraldically combining) two coats of arms. For a time, dimidiation preceded the method known as impalement. Thus for Final Fantasy XI, the Rune Fencer has a split light then on the second hit, it sparkles.