DIFO-EN000 (ScR)"Libromancer Fire" DIFO-EN001 (SR)"Performapal Gentrude" DIFO-EN002 (SR)"Performapal Ladyange" DIFO-EN003 (C)"Therion "Bull" Ain" DIFO-EN004 (C)"Therion "Reaper" Fum" DIFO-EN005 (C)"Therion "Duke" Yul" DIFO-EN006 (ScR)"Therion "Lily" Borea" DIFO-EN007 (ScR)"Therion "King" Regulus" DIFO-EN008 (ScR)"Visas Starfrost" DIFO-EN009 (C)"Scareclaw Astra" DIFO-EN010 (C)"Scareclaw Belone" DIFO-EN011 (C)"Scareclaw Acro" DIFO-EN012 (UR)"Scareclaw Reichheart" DIFO-EN013 (C)"Mad Mauler" DIFO-EN014 (C)"Alghoul Mazera" DIFO-EN015 (C)"Heroic Challenger - Knuckle Sword" DIFO-EN016 (C)"Heroic Challenger - Morning Star" DIFO-EN017 (C)"Predaplant Byblisp" DIFO-EN018 (C)"Predaplant Bufolicula" DIFO-EN019 (C)"Predaplant Triantis" DIFO-EN020 (C)"Symphonic Warrior Guitariss" DIFO-EN021 (C)"Symphonic Warrior DJJ" DIFO-EN022 (UR)"Noh-P.U.N.K
What it does make up for is its Ability to nullify Special Conditions
the hard part is the right variant (reverse holo, 1st Edition, Master Ball pattern)
UB can play off the same strong commons and uncommons as UR does, and it has some great expensive spells to pair them with like Sephiroth's Intervention, Ice Magic, Dreams of Laguna (flashback), and Sidequest: Hunt the Mark
Sylvan Librarys controller is responsible for keeping these cards distinguishable in hand, such as by keeping them separate from cards that began the turn in hand
If your Commander deck is weak or slow because it's following a specific gimmick (such as only including cards where there are hats in the art), then bracket one is likely where your deck is going to be