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If your commander cares about tapping, you probably care about Patriar's Seal which is way more flexible as a colorless card
More importantly, the creature card has a useful ability in that whenever it attacks or is targeted by an opponents spell, it can deal three damage to each opponent (making it potentially useful in multiplayer formats such as Commander) or exile (essentially remove from the game, in Magic: The Gatherings lingo) the top two cards of the players deck - the player then picks one of those two cards, which they can choose to play until the end of their next turn
Read More: Our picks for the best Kaldheim cards for Modern 2 Krenko, Mob Boss Speaking of Goblins, Krenko, Mob Boss is basically the one gobbo to rule them all
And even though Memnarch is a colorless artifact creature, his color identity is blue because of his blue activated abilities