I was the DM in a game last night and the scenario was thus:
The healer on the ground floor of a tower wanted to cast Bless on her companions the floor above. This floor only had one access point, a trap door which was closed. I argued, that since they were behind total cover as per PHB 204:
A target with total cover can’t be targeted directly by an attack or a spell, although some Spells can reach such a target by including it in an area of effect. A target has total cover if it is completely concealed by an obstacle.
that bless would not work, her opinion was that since in the spell it mentions blessing up to 3 creatures in range. that the cover rules would not apply as you are not targeting a creature but a point between the creatures.
You bless up to three creatures of your choice within range. Whenever a target makes an attack roll or a saving throw before the spell ends, the target can roll a d4 and add the number rolled to the attack roll or saving throw.
At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, you can target one additional creature for each slot level above 1st.
Is either of our rulings correct?