Gloom

Oracle Text

White spells cost 3 more to cast.

Activated abilities of white enchantments cost 3 more to activate.

Card Rulings

10/4/2004 The extra mana is not considered part of the activation cost. It is a separate cost.
10/4/2004 The additional mana is paid at the same time the spell/ability is cast/activated.
10/4/2004 The extra mana is part of the total cost, so cost reducers can be applied to this cost.
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.

Additional Information