OrnithopterutilityBudget$0.37Another iconic zero-mana artifact creature that fills a similar ultra-cheap defensive/board-presence role, though it trades defender for flying and no blocking penalty.
Cliffhaven KitesailutilityBudget$0.18A very cheap evasive artifact creature with a similar low-cost artifact body that can contribute to early blocking or board setup, though it is not a wall.
Walking BulwarkutilityBudget$0.17A zero-mana artifact creature built for defense, with wall-like functionality and a scaling toughness plan similar to Shield Sphere's blocking niche.
MemniteutilityBudget$1.61A zero-mana artifact creature that provides immediate board presence, similar in cost and role as a free artifact creature even though it is offensive rather than defensive.
Accorder's ShieldprotectionBudget$0.25A zero-mana artifact that emphasizes blocking and defense, making it a close functional cousin for decks wanting cheap survivability tools.
Wall of EssenceutilityBudget$0.27A dedicated defensive wall that rewards blocking and can absorb damage, serving a similar early-game stall role at a low cost.
Carapace ForgerutilityBudget$0.13Not a wall, but it is a cheap artifact-bodied defensive creature in artifact-centric shells, offering a similar early board role at low mana investment.
Steel WallutilityBudget$0.54A classic cheap defender that occupies the same pure-blocking role, with a sturdier body but no artifact subtype.