The objects of the Cleric’s BLESS move are explicitly singular: “someone or something.”
After my DURATION tweak for the Mage, I’ve begun exploring how to let clerics to spend Favor to bestow a blessing or inflict a curse that lasts longer and/or affects more than one person or object:
When you call upon your Deity to empower, protect, hinder, or afflict someone or something, explain how this divine intervention is pursuant to your faith and roll+PRI:
(+) The effect is granted and has duration 3.
(=) The effect is granted and has duration 1.
Before you roll, you may spend favor 1-for-1 to add Duration or Recipients of the blessing or curse. Any Favor spent on additional Duration or Recipients is regained only when the blessing or curse ends. You may permanently burn 1 point
of your Prime Ability to make a curse permanent.