Power Artifact

Text:

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.

Rulings:

• 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.
• 6/8/2016 Activated abilities contain a colon. They’re generally written “[Cost]: [Effect].” Some keywords are activated abilities and will have colons in their reminder text.