Clerics with the Arcana domain get special powers:
When you choose this domain at 1st level, you gain proficiency in the Arcana skill, and you gain two cantrips of your choice from the wizard spell list. For you, these cantrips count as cleric cantrips.
Starting at 8th level, you add your Wisdom modifier to the damage you deal with any cleric cantrip.
If I pick Green-Flame Blade (Sword Coast Adeventurer's Guide) at level 1, do I get to add my Wisdom modifier against both opponents?