Wall of Airutility$2.00A classic blue defensive flyer with defender that blocks air attacks and fills the same early-game stall role.
Fog Bankutility$0.60Very similar blue wall-style defender with flying that is excellent at stalling combat and protecting your life total.
Aegis TurtleutilityBudget$0.05Another cheap blue defender that functions as an early roadblock, though it lacks flying.
Wall of FrostutilityBudget$0.21A stronger defensive blue wall that stalls attackers effectively and serves the same control-oriented role.
Hoverguard SweepersutilityBudget$0.23A blue flying defensive creature that also interacts with combat through tempo, making it a close evasive utility piece.
Guard Gomazoautility$0.62A defensive flying wall-like creature that is difficult to profitably attack into, similar as a combat stopper.
Tetsuko Umezawa, FugitiveutilityBudget$0.13While not a wall, it serves a similar defensive-blue role by enabling evasive creatures and discouraging conventional attacks.
Wall of RunesutilityBudget$0.11A budget defensive wall that replaces the flying body with card selection, but still serves as cheap early defense.