Suppression Field
Ravnica: City of Guilds — uncommon
Enchantment
Suppression Field rulings:
2016-06-08: Activated abilities contain a colon. They’re generally written “[Cost]: [Effect].” Some keywords are activated abilities and will have colons in their reminder text.
2005-10-01: 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.)