Activated abilities contain a colon. They’re generally written “[Cost]: [Effect].” Some keywords are activated abilities and will have colons in their reminder text.
15-07-2006
wotc
Can’t reduce Snow mana costs.
04-10-2004
wotc
It will never reduce any colored mana portion of an activation cost.
04-10-2004
wotc
It will not add a {1} to abilities with no generic mana in their activation cost.
04-10-2004
wotc
The cost reduction can be applied to additional costs.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.