| Y | - | C | - | T |
Y = You
C = Invisible Creature
T = Target
The DM rules that C provides half cover for T. The table uses the optional rules for hitting cover:
If a creature is providing cover for the missed creature and the attack roll exceeds the AC of the covering creature, the covering creature is hit.
Y tries casting fire bolt on T and does not hit T, but is high enough to exceed the AC of C (who is invisible).
How is the attack against the invisible creature resolved?
Does the attack roll get disadvantage against the invisible creature (because of the invisible condition)?
Or, does the fire bolt simply hit the invisible creature per the text of the optional rule for hitting cover?
Or am I missing something else entirely?
It seems to me like the second reading (simply hits the invisible creature), would make it easier to hit the creature than by targeting it directly which seems very odd to me.