You can't try to attach an Equipment to the target creature that can't legally be attached to it
Beast - Wolfsbane is a Legendary Character card from the Lorcana set The First Chapter

Take a look at the entire Commander deck below: Creatures (36) 1 Vampiric Dragon 1 Malakir Bloodwitch 1 Vampire Nighthawk 1 Anowon, the Ruin Sage 1 Butcher of Malakir 1 Nirkana Revenant 1 Bloodlord of Vaasgoth 1 Rakish Heir 1 Falkenrath Noble 1 Stromkirk Captain 1 Blood Artist 1 Dark Impostor 1 Necropolis Regent 1 Falkenrath Gorger 1 Indulgent Aristocrat 1 Stromkirk Condemned 1 Stromkirk Occultist 1 Bloodline Necromancer 1 Bloodsworn Steward 1 Crimson Honor Guard 1 Patron of the Vein 1 Sanctum Seeker 1 Champion of Dusk 1 Bloodtracker 1 Cordial Vampire 1 Anje's Ravager 1 Strefan, Maurer Progenitor 1 Bloodtithe Harvester 1 Timothar, Baron of Bats 1 Crossway Troublemakers 1 Scion of Opulence 1 Kamber, the Plunderer 1 Midnight Arsonist 1 Markov Enforcer 1 Shadowgrange Archfiend 1 Laurine, the Diversion Lands (37) Spells (27) 1 Sol Ring 1 Ancient Craving 1 Night's Whisper 1 Fire Diamond 1 Charcoal Diamond 1 Rakdos Signet 1 Urge to Feed 1 Swiftfoot Boots 1 Blasphemous Act 1 Underworld Connections 1 Rakdos Charm 1 Vandalblast 1 Unstable Obelisk 1 Commander's Sphere 1 Mob Rule 1 Damnable Pact 1 Avacyn's Judgment 1 Stensia Masquerade 1 Arcane Signet 1 Molten Echoes 1 Feed the Swarm 1 Sinister Waltz 1 Glass-Cast Heart 1 Olivia's Wrath 1 Predators' Hour 1 Arterial Alchemy 1 Imposing Grandeur What do you think of the Vampiric Bloodline deck and Timothar, Baron of Bats

Any legendary creature can be your commander, but every card in your deck must share a color with that creature
I regularly have trouble cutting out the last 30 cards from my brews, compared to the last five or six cards with other strategies
Spice up your deck with beautiful black and neon ink treatments