1. Alocard (Inspired by Alucard from Hellsing)

How to Obtain: Summon from the standard banner after reaching Level 10.

Drop Rate: Around 0.004% (1 in 25,000 chance)

Tips:

• Use Super Lucky (99 Robux) or Ultra Lucky (199 Robux) potions to boost odds.
• Summoning 10 units at once (500 Gems) may slightly increase your chances.

Evolution: Can evolve into Alocard (Vampire King) using specific materials.

2. Igros (Inspired by Igris from Solo Leveling)

How to Obtain: Clear Legend Stage 3 of the Double Dungeon mode.

Drop Rate: About 0.75%

Requirements:

• Unlock Legend Stages by completing all stages on Nightmare difficulty.
• Recommended for players Level 21 or higher.

Evolution: Can evolve into Igros (Elite Knight).

3. Rengoku (Inspired by Kyojuro Rengoku from Demon Slayer)

How to Obtain: Join the Spider Forest Act 4: Web Demon raid.

Drop Rate: 1% (can increase to 2% with a Fortune Catalyst – Slayer)

Additional Info:

• Earn Red Webs during the raid.
• Exchange them in the Rengoku Raid Shop for rewards.

4. Sukuno (Inspired by Sukuna from Jujutsu Kaisen)

How to Obtain: Evolve Itadori by collecting 20 Cursed Fingers.

Where to Get Cursed Fingers: Shibuya Infinite stage.

5. Tuji (Inspired by Toji Fushiguro from Jujutsu Kaisen)

How to Obtain:

• Clear Shibuya Station Act 2 on Legend difficulty.
• Sacrifice a JJK unit from Update 1 to the Cursed Worm.
• Replay Act 2 on Story mode to complete the process.

6. Julias (Inspired by Julius Novachrono from Black Clover)

How to Obtain: Reach Level 25 in the Battle Pass (Update 1).

Availability:

• Free tier: base version of Julias.
• Premium tier: includes evolved version.

7. Saber (Alternate) (Inspired by Saber from Fate/stay night)

How to Obtain:

• Join the Boss Rush: Dark-Tainted Tyrant - Saber (Alternate).
• Place Saber (King of Knights) beside the A.W.E. sub-boss on waves 15 and 25.
• Each interaction has a 0.75% chance to get Saber (Alternate).

8. Sokora (Inspired by Sakura from Naruto)

How to Obtain: Complete the Saber (Alternate) Boss Rush event.

Drop Rate: 2%

9. Isdead (Inspired by Esdeath from Akame ga Kill!)

How to Obtain: Clear the Frozen Domain Portal, unlocked after finishing Floor 50 in Worldlines.

10. Haruka Rin (Original Character)

How to Obtain: Reach Level 30 in the Free Battle Pass.

Note: One of the more accessible Secret Units due to its simple level requirement.