AEther Barrier
{2}{U}
Enchantment
Whenever a player casts a creature spell, that player sacrifices a permanent of their choice unless they pay {1}.
Bloodbond March
{2}{B}{G}
Enchantment
Whenever a player casts a creature spell, each player returns all cards with the same name as that spell from their graveyard to the battlefield.
Pure Reflection
{2}{W}
Enchantment
Whenever a player casts a creature spell, destroy all Reflections. Then that player creates an X/X white Reflection creature token, where X is the mana value of that spell.
Tangleroot
{3}
Artifact
Whenever a player casts a creature spell, that player adds {G}.