The Unchained Fire node says “Fireball costs no mana to cast…”, but appears to be reducing the cost by a set amount instead. When taking cost increasing nodes (e.g. Fire Spray, Piercing Heat) the cost increases to a non-zero amount.
Tooltip for Unchained Fire should either say it reduces the mana cost by an amount or properly set the mana cost to 0 like it states it does.
