Budget Alternatives to Aether Barrier

Soul Tithe $0.14 1W · Aura Enchant nonland permanent Slow Motion $0.17 2U · Aura Enchant creature Akki Underminer $0.21 3R · Goblin Rogue Shaman Whenever this creature deals combat damage to a player, that player sacrifices a permanent of the... Soul Barrier $0.22 2U · Enchantment Whenever an opponent casts a creature spell, this enchantment deals 2 damage to that player unles... Rishadan Cutpurse $0.24 2U · Human Pirate When this creature enters, each opponent sacrifices a permanent of their choice unless they pay {1}. Isolation Cell $0.30 4 · Artifact Whenever an opponent casts a creature spell, that player loses 2 life unless they pay {2}. Jund $0.35 Alara Whenever a player casts a creature spell that's black, red, or green, it gains devour 5. Unifying Theory $0.39 1U · Enchantment Whenever a player casts a spell, that player may pay {2}. Rishadan Footpad $0.40 3U · Human Pirate When this creature enters, each opponent sacrifices a permanent of their choice unless they pay {2}. Fade Away $0.45 2U · Sorcery For each creature, its controller sacrifices a permanent of their choice unless they pay {1}. Pure Reflection $0.49 2W · Enchantment Whenever a player casts a creature spell, destroy all Reflections. Rishadan Brigand $0.56 4U · Human Pirate Flying Tangleroot $0.72 3 · Artifact Whenever a player casts a creature spell, that player adds {G}. Forbidden Ritual $0.95 2BB · Sorcery Sacrifice a nontoken permanent. Phyrexian Tyranny $1.37 UBR · Enchantment Whenever a player draws a card, that player loses 2 life unless they pay {2}.