There are 5 Rapier and Shield Challenges in Crimson Desert. They are part of the Mastery Category. Finishing all Rapier and Shield Challenges unlocks the Master of Rapiers trophy & achievement.
Challenges Overview:
Dancing Blade, Shining Shield 1
- How to Unlock: Pick up Sealed Abyss Artifact in Hernand, on the side of the road directly south of Meshley Trapsmith.

- Challenge: Defeat 5 enemies with a Rapier within 60 seconds.
- How to Complete: While playing as Damiane, defeat 5 enemies with her Rapier in under 1 minute.
- Reward: 1x Abyss Artifact, 1x Destruction I
Dancing Blade, Shining Shield 2
- How to Unlock: Pick up Sealed Abyss Artifact in Demeniss, at intersection directly south of the A in GOLDEN PLAINS map text.

- Challenge: Stab enemies 10 times with a rapier without taking damage.
- How to Complete: Damanie’s rapier has the same Stab input same as Kliff (
+
/
+
/ SHIFT + Right Click ). So for this requirement you just need to hit any enemy a total of 10 times without taking damage using this Stab attack. There is no time limit, so you can slowly deal with single enemies to avoid damage. - Reward: 1x Abyss Artifact, 1x Haste I
Dancing Blade, Shining Shield 3
- How to Unlock: Pick up Sealed Abyss Artifact in Demeniss, on the side of the road south of Ironwood Farmhouse.

- Challenge: Hit a prone enemies 5 times with a rapier.
- How to Complete: Knock down enemies to the floor so they go prone, then stab them on the floor with Damiane’s Rapier.
- Reward: 1x Abyss Artifact, 1x Shred I
Dancing Blade, Shining Shield 4
- How to Unlock: Pick up Sealed Abyss Artifact in Delesyia, on the side of the road northwest from Fort Windridge.

- Challenge: Take down 3 enemies at once from over 10 metres away using a rapier.
- How to Complete: This requirement specifically requires using Damiene’s ability Smiting Bolt, which is a ranged attack performed by pressing
, causing a vertical beam to hit enemies targeted in front of her. To do this requirement you should fully upgrade this skill as the second level causes a second input of the attack to cast a set of three beams, and the third level makes the attack never miss the enemy it targets. You will then need to find a large group of enemies to perform this on, or get lucky with a bunched up group of bandits on the side of the road. Make sure you are a bit away from the enemies, use the beam attack twice in a row and the second attack should hopefully take out 3. - Reward: 1x Abyss Artifact, 1x Greater Insight
Dancing Blade, Shining Shield 5
- How to Unlock: Pick up Sealed Abyss Artifact in Demeniss, on the side of the road southwest of Spire of Clockwork.

- Challenge: Hit 9 enemies within 15 seconds with Shield Toss.
- How to Complete: Shield toss is an ability Damiene has which is performed by pressing
, causing her to throw her shield toward enemies, with it bouncing to other enemies and dealing damage. Further upgrades cause it to bounce more times, but for this requirement you should be able to complete it with the basic ability and using it multiple times on a larger group of enemies. - Reward: 1x Abyss Artifact, 1x Faded Abyss Artifact, 1x Swift I

ScorpionEagle says
You can use the training dummy in the greymane camp to get some of the combat challenges. Completed Shining Shield 2 with the dummy in the Howling Hill camp. Run up, lock on, stab stab stab, sheath rapier, walk away far enough for ‘combat’ to de-agro, use sealed artifact. Also got When Lightning Strikes 3 with the dummy. Anything that requires multiple enemies or actually defeating enemies won’t work tho