Power Artifact

Enchant Artifact    (CMC:2)

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

57 ME4 • ENDouglas Shuler

™ & © 1993—2011 Wizards of the Coast

Legal in: Legacy,Vintage,Commander

Oracle Text (click to copy):

10/4/2004
Only affects the generic mana part of activation costs. Colored parts of mana costs are not affected.
10/4/2004
Can be placed on artifacts with no or zero activation costs, but this has no effect on them. It does not increase the cost to one.
7/15/2006
Can't reduce Snow mana costs.
7/1/2013
Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." Some keywords are activated abilities and will have colons in their reminder texts.