Magic Online Promos

Power Artifact

Enchant artifact
Enchanted artifact's activated abilities cost {2} less to activate. This effect can't reduce the mana in that cost to less than one mana.

Masters Edition IV

Enchant artifact
Enchanted artifact's activated abilities cost {2} less to activate. This effect can't reduce the amount of mana an ability costs to activate to less than one mana.

Antiquities

The activation cost of target artifact is reduced by o2. If this would reduce target artifact's activation cost below o1, target artifact's activation cost becomes o1. Power Artifact has no effect on artifacts that have no activation cost or whose activation cost is o0.