The best The Underworld of Secrets cards under $20 (2026)

The strongest The Underworld of Secrets cards you can buy for under $20 right now, ranked by real closed-sale prices — not guesses, not asking prices. Updated August 2026; the order shifts as the market does.

Also: under $50 · under $100

1. 1
   
   Soul Absorption The Ethereal King (The Underworld of Secrets)

   $17· $49.99 new/sealed
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2. 2
   
   Launch of Megiddo Mover of Worlds (The Underworld of Secrets)

   $12.13· $37.99 new/sealed
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3. 3
   
   Metamorphosis Dendrobium (The Underworld of Secrets)

   $11.64· $64.99 new/sealed
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4. 4
   
   Grandleon Strongest Ancient (The Underworld of Secrets)

   $11.55· $11.99 new/sealed
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5. 5
   
   Grandleon Strongest Ancient Full Art (The Underworld of Secrets)

   $11.25· $24.99 new/sealed
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6. 6
   
   Hyde Solitary Assassin (The Underworld of Secrets)

   $11· $11.55 new/sealed
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7. 7
   
   Dexia Ethereal Twin Prince Full Art (The Underworld of Secrets)

   $8.2· $12.99 new/sealed
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8. 8
   
   Dexia Ethereal Twin Prince (The Underworld of Secrets)

   $7.68· $9.99 new/sealed
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9. 9
   
   Neun (The Underworld of Secrets)

   $6· $16.99 new/sealed
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10. 10
    
    Hyde Solitary Assassin Full Art (The Underworld of Secrets)

    $6· $49.99 new/sealed
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11. 11
    
    The Damascus Moon Full Art (The Underworld of Secrets)

    $5.99· $6.29 new/sealed
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12. 12
    
    Ethereal Princess Full Art (The Underworld of Secrets)

    $5.78· $10.99 new/sealed
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13. 13
    
    Reconnaissance Gears Full Art (The Underworld of Secrets)

    $5.23· $5.23 new/sealed
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14. 14
    
    Secret Stone of the Ethereal Moon (The Underworld of Secrets)

    $5.08· $9.99 new/sealed
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15. 15
    
    Secret Stone of the Wanderer Moon (The Underworld of Secrets)

    $5· $8.99 new/sealed
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16. 16
    
    Secret Stone of the Chaos Moon (The Underworld of Secrets)

    $4.72· $9.99 new/sealed
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17. 17
    
    Sechs (The Underworld of Secrets)

    $4· $16.99 new/sealed
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18. 18
    
    Metal Helix Full Art (The Underworld of Secrets)

    $3.6· $4.99 new/sealed
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19. 19
    
    Rushing Dinosaur Full Art (The Underworld of Secrets)

    $3.47· $6.29 new/sealed
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20. 20
    
    Rusty Phantom Ninja Genius Full Art (The Underworld of Secrets)

    $3.35· $15.74 new/sealed
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21. 21
    
    Twin Deathscythe Severing Scythe Deathscythe Chronogear (The Underworld of Secrets)

    $3.2· $35 new/sealed
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22. 22
    
    Ancient Weapon Fragment Full Art (The Underworld of Secrets)

    $3.17· $12 new/sealed
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23. 23
    
    Mausoleum of the Ruined Nation Full Art (The Underworld of Secrets)

    $3.15· $6.99 new/sealed
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24. 24
    
    Ethereal Defense Trooper Full Art (The Underworld of Secrets)

    $3.08· $3.15 new/sealed
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25. 25
    
    Rustys Fox Full Art (The Underworld of Secrets)

    $3· $3 new/sealed
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26. 26
    
    Glowing Spider Full Art (The Underworld of Secrets)

    $3· $3 new/sealed
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27. 27
    
    Secret Stone of the Cat Moon (The Underworld of Secrets)

    $3· $9.99 new/sealed
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28. 28
    
    Ethereal Princess (The Underworld of Secrets)

    $2.99· $4.99 new/sealed
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29. 29
    
    Dexias Advice Full Art (The Underworld of Secrets)

    $2.9· $8 new/sealed
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30. 30
    
    Child of Crimson Wind (The Underworld of Secrets)

    $2.86· $10.49 new/sealed
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31. 31
    
    Megiddo Artificial Sun Full Art (The Underworld of Secrets)

    $2.85· $5.99 new/sealed
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32. 32
    
    Sechss Return from Retirement Full Art (The Underworld of Secrets)

    $2.65· $6 new/sealed
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33. 33
    
    Melira Metalworking Researcher Full Art (The Underworld of Secrets)

    $2.65· $10.99 new/sealed
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34. 34
    
    Rusty Phantom Ninja Genius (The Underworld of Secrets)

    $2.63· $7 new/sealed
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35. 35
    
    Wanderers Castle Full Art (The Underworld of Secrets)

    $2.62· $5.99 new/sealed
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36. 36
    
    Dexias Advice (The Underworld of Secrets)

    $2.57· $5 new/sealed
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37. 37
    
    Messenger from the Paramita of the Dead Full Art (The Underworld of Secrets)

    $2.55· $3.99 new/sealed
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38. 38
    
    Refrain Resident of Wanderers Castle (The Underworld of Secrets)

    $2.51· $16.99 new/sealed
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39. 39
    
    The Light of Megiddo Full Art (The Underworld of Secrets)

    $2.46· $5.99 new/sealed
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40. 40
    
    Metal Lifeform Dragon Full Art (The Underworld of Secrets)

    $2.45· $5.99 new/sealed
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41. 41
    
    Ancient Weapon Fragment (The Underworld of Secrets)

    $2.4· $9.99 new/sealed
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42. 42
    
    Magical Rabbit Full Art (The Underworld of Secrets)

    $2.39· $7.99 new/sealed
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43. 43
    
    Dreadnought Dinosaur Full Art (The Underworld of Secrets)

    $2.27· $5.99 new/sealed
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44. 44
    
    Ethereal Witch Full Art (The Underworld of Secrets)

    $2.26· $3.99 new/sealed
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45. 45
    
    Dragon of Megiddo Full Art (The Underworld of Secrets)

    $2.22· $9.99 new/sealed
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46. 46
    
    Whistling Summoning Full Art (The Underworld of Secrets)

    $2.21· $2.99 new/sealed
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47. 47
    
    Entangling Web Full Art (The Underworld of Secrets)

    $2.2· $3.99 new/sealed
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48. 48
    
    Magical Power Piggy Bank Full Art (The Underworld of Secrets)

    $2.1· $6.99 new/sealed
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49. 49
    
    Ethereal Researcher Full Art (The Underworld of Secrets)

    $2.07· $5.99 new/sealed
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50. 50
    
    Unleashing Magical Power Full Art (The Underworld of Secrets)

    $2.05· $5.99 new/sealed
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