After reviving another player, grant them a Radiant Prism that blocks incoming damage for 5 seconds. The first time you take lethal damage, gain a Radiant Prism that blocks incoming damage for 10 seconds. While active, reviving another player fully restores both players but removes the Prism even at full danger. Resets on Behemoth kill or after 5 minutes.
Prismatic Grace is a craftable helm. It is a Tier 4 armour crafted from Rezakirireagents. The blueprint is obtained by collecting the lore item Rezakiri Idol. After collecting the Rezakiri Idol, talk to Scarred Master in Ramsgate to collect the blueprint.
After reviving another player, grant them a Radiant Prism that blocks incoming damage for 5 seconds. The first time you take lethal damage, gain a Radiant Prism that blocks incoming damage for 10 seconds. While active, reviving another player fully restores both players but removes the Prism even at full danger. Resets on Behemoth kill or after 5 minutes.
Be careful when using this with the perk Nine Lives. The unique effect won't proc on your first death due to Nine Lives having priority. Nine Lives also stops you from going into an actual 'downed' state.
If a Slayer makes frequent use of the Revenant omnicell, it is highly discouraged from using Prismatic Grace, as health will not be restored in Revenant State and the Slayer will only gain a protective prism before being immediately downed again, wasting the free revive.