Why Flame Soul is the only dual-color Class weapon?

[Lyya]

Answered with action:

Changes to Mana color of Flame Soul

The Sunspear Class Weapon Flame Soul has had its Mana color changed to Red from Red/Green. Class Weapons were originally only intended to be mono-color, so we’ve returned the Flame Soul to Red only as it was intended to be. No Weapon refunds are available for this change. Please restart your game to see this.

Flame Soul is no longer the only dual-color Class weapon, as there are no longer any dual-color Class weapons.