Royal Knight's Resolve is a Skill in Elden Ring. Royal Knight's Resolve is a regular skill that can be found in Ashes of War, this can be used on all melee armaments.

Elden Ring Royal Knight's Resolve Guide, Notes & Tips

• This is an Ash of War Skill, associated with the Ash of War: Royal Knight's Resolve.
• FP Cost: 15
• Buffs damage of next landing swing by 80%, fading immediately after the blow.
• Fades after 10 seconds without successfully landing a blow.
• Prior to Patch 1.03, Royal Knight's Resolve used to buff the damage of all sources, including other weapons or incantations, as long as you did not unequip the weapon. Additionally, the 80% bonus damage did not get removed by attacking with other weapons or using sorceries/incantations/weapon arts.
• This Skill is not Chargeable
• This Skill cannot be Parried
• Dagger Talisman is close by, giving you a boost to all critical attacks(backstabs/riposte)
• Note: As of Patch 1.09, the effectiveness of the Royal Knight's Resolve Ashe of war has decreased in PVP only (40%)