The Grimoire is operated by DiceBard.com, Dice Bard has everything you need to play 5e... as long as all you need to play 5e is dice.

Holy Aura 8th level abjuration

Casting Time: 1 action

Range: Self

Components: V, S, M (a tiny reliquary worth at least 1,000 gp containing a sacred relic, such as a scrap of cloth from a saint's robe or a piece of parchment from a religious text)

Duration: Concentration, up to 1 minute

Tags: cleric level8 abjuration

Divine light washes out from you and coalesces in a soft radiance in a 30-foot radius around you. Creatures of your choice in that radius when you cast this spell shed dim light in a 5-foot radius and have advantage on all saving throws, and other creatures have disadvantage on attack rolls against them until the spell ends. In addition, when a fiend or an undead hits an affected creature with a melee attack, the aura flashes with brilliant light. The attacker must succeed on a Constitution saving throw or be blinded until the spell ends.

You can find more information on this spell in: PHB.251