Fire Blessing, grants the Paladin a fire sword, which can leave burns on the enemy, and it grants the paladin +175% fire resistance.
The Paladin is the elite unit of the Humans, being heavily armored, and dealing a lot of damage. However, it costs fairly much resources, and needs three buildings, making this an expensive unit. With the Fire Blessing, it deals much more damage, because of the Fireburst the sword gives. The Fire Blessing also provides excellent resistance against Fire Mage users, like Orcs.
The knights of the Orders of Dawn, the Iron Falcon or Tiaras have always been steady companions of the Army of Light. In among the realm they combine the mobility of mounted crossbowmen with heavy armor and an unexcelled sword arm. Their faith does not only give them power, but also the ability to effect divine magic against the Undead, which makes them particularly effective against these enemies.