Accorder's ShieldutilityBudget$0.25A zero-mana artifact that primarily serves as cheap defense by granting defender and toughness-based blocking utility. It fills the same role as an early wall-like piece of protection.
OrnithopterutilityBudget$0.37A free artifact creature used to soak attacks, enable artifact synergies, and protect life total early. Unlike Shield Sphere it has evasion instead of defender, but it is the same kind of zero-cost board presence.
Gideon's SacrificeprotectionBudget$0.14A defensive effect that redirects combat damage away from you, functioning as a protection tool rather than a blocker. It serves the same role of buying time against attackers.
Wall of MulchutilityBudget$0.13A classic cheap wall that repeatedly blocks and converts spare creatures into card advantage. It shares the same defensive role as Shield Sphere in stalling aggressive decks.
Wall of Omenscard_drawBudget$0.28An efficient blocker that replaces itself immediately, making it a stronger defensive cantrip wall. It serves the same early-game anti-aggro role with added value.
Carapace ForgerutilityBudget$0.13A low-cost artifact-adjacent creature that can come down early and defend while rewarding artifact-heavy builds. It plays a similar role in buying time in artifact decks.
Walking BulwarkutilityBudget$0.17A defensive artifact creature that can help protect life total and leverage toughness-based blocking. It is a modern functional stand-in for a small wall-style artifact body.
Steel WallutilityBudget$0.54A very close analogue: a cheap artifact wall designed almost purely to block early attackers. It is one of the most direct budget equivalents to Shield Sphere.