Like, one of your opponents is going to have something multicolored in Commander, so this becomes essentially an auto-include for any red deck
Oskar, Rubbish Reclaimer Oskar, Rubbish Reclaimer exploits Dimirs many, many loot effects to become a strong card advantage engine
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The main disadvantage that Oswald Fiddlebender has is that he needs to stick around so he can tap to activate his ability, but you can rapidly chain things together to set up a combo or try to lock things down
Id lean towards token decks being the stronger of the two as you arent limited to one trigger a turn, and cards like Third Path Iconoclast and Kykar, Wind's Fury could load this card down with counters
(Zero is even.) Your opponents can't block with creatures with even mana values