Budget Alternatives to Defense Grid

Cruel Feeding $0.04 B · Instant Strive — This spell costs {2}{B} more to cast for each target beyond the first. Colossal Heroics $0.05 2G · Instant Strive — This spell costs {1}{G} more to cast for each target beyond the first. Hour of Need $0.07 2U · Instant Strive — This spell costs {1}{U} more to cast for each target beyond the first. Desperate Stand $0.07 RW · Sorcery Strive — This spell costs {R}{W} more to cast for each target beyond the first. Phalanx Formation $0.07 2W · Instant Strive — This spell costs {1}{W} more to cast for each target beyond the first. Chill of the Grave $0.08 2U · Instant This spell costs {1} less to cast if you control a Zombie. Aerial Formation $0.09 U · Instant Strive — This spell costs {2}{U} more to cast for each target beyond the first. Vanish into Eternity $0.14 2W · Instant This spell costs {3} more to cast if it targets a creature. Fireball $0.15 XR · Sorcery This spell costs {1} more to cast for each target beyond the first. Polymorphous Rush $0.17 2U · Instant Strive — This spell costs {1}{U} more to cast for each target beyond the first. Officious Interrogation $0.25 WU · Instant This spell costs {W}{U} more to cast for each target beyond the first. Lightstall Inquisitor $0.29 W · Angel Wizard Vigilance Consign to Dust $0.29 2G · Instant Strive — This spell costs {2}{G} more to cast for each target beyond the first. Harness by Force $0.30 1RR · Sorcery Strive — This spell costs {2}{R} more to cast for each target beyond the first. Damping Sphere $0.47 2 · Artifact If a land is tapped for two or more mana, it produces {C} instead of any other type and amount. Hum of the Radix $0.52 2GG · Enchantment Each artifact spell costs {1} more to cast for each artifact its controller controls. Setessan Tactics $0.52 1G · Instant Strive — This spell costs {G} more to cast for each target beyond the first. Solidarity of Heroes $1.26 1G · Instant Strive — This spell costs {1}{G} more to cast for each target beyond the first.