From The Heroes of Might and Magic III wiki

This is a combination artifact.

Combination artifacts were introduced in the expansion Shadow of Death,
and are only available when it is installed.

In addition to all of the bonuses the Angelic Alliance allows the wearer to mix creatures from towns of good and neutral Alignment without morale penalty. At the beginning of each combat the Angelic Alliance will cast Expert Prayer. The combination of artifacts gives a total of +21 to all primary skills.

Requires the following artifacts to create:

• Helm of Heavenly Enlightenment
• Celestial Necklace of Bliss
• Sword of Judgement
• Armor of Wonder
• Sandals of the Saint
• Lion's Shield of Courage

You cannot purchase combination artifacts in Artifact Merchants. Cost is derived from sell price.

Basic Cost: 420000 gold

The most expensive artifact in Shadow of Death.