Copper Conduit

Artifact spells you cast can't be countered.
Whenever you cast an artifact spell or activate an ability of an artifact, you get {e}.
Whenever you pay any amount of {e}, Copper
Conduit deals 2 damage to each opponent.
{6}, {t}, Pay {e}{e}{e}{e}{e}{e}: You may cast artifact
spells this turn without paying their mana costs.