Memniteutility$1.61Another free artifact creature that helps flood the board immediately. It fills a similar role as an efficient zero-mana flyer-adjacent artifact body, though without evasion.
Shield Sphereutility$7.84A zero-mana artifact creature with excellent defensive utility, often used in low-cost artifact synergies. Like Ornithopter, it contributes to artifact count for almost no mana.
Phyrexian Walkerutility$1.21A free artifact creature that functions as a cheap board presence for artifact-based decks. It is similar in being cast for no mana, though it trades flying for toughness.
GingerbruteutilityBudget$0.16A one-mana evasive artifact creature that often plays a similar role in aggressive and artifact synergy decks. It costs more, but offers direct pressure and useful evasion.
Esper Sentinelcard_draw$49.91A cheap artifact creature that provides strong early-game value in artifact-centric strategies. It is not a direct copy, but it is a premium one-mana artifact body with high utility.
Mishra's Baubleutility$12.88Not a creature, but a zero-mana artifact commonly used for the same reason as Ornithopter: free artifact count and synergy. It supports metalcraft, affinity, and other artifact-matters effects at no mana cost.
Urza's Baubleutility$6.97A free artifact that contributes to artifact density and cantrip-style value in combo and synergy decks. It matches Ornithopter in being a zero-mana artifact enabler, though without board presence.
Darksteel Citadelutility$1.33A zero-mana artifact permanent that similarly boosts artifact count without spending mana. It is a land rather than a creature, but it serves the same synergy role in many decks.