Suppression Field

• WWizards of the Coast2005-10-01
  Official Ruling
  Suppression Field’s ability doesn’t affect static abilities, triggered abilities, or mana abilities. (A “mana ability” is an ability that produces mana, not an ability that costs mana.)
• WWizards of the Coast2016-06-08
  Official Ruling
  Activated abilities contain a colon. They’re generally written “[Cost]: [Effect].” Some keywords are activated abilities and will have colons in their reminder text.

Rulings via Scryfall