The relevant part of the description of the darkness spell reads:
Magical darkness spreads from a point you choose within range to fill
a 15-foot radius sphere for the duration. […] nonmagical light can’t
If any of this spell’s area overlaps with an area of light created by
a spell of 2nd level or lower, the spell that created the light is
The description of the faerie fire spell reads, in part:
Each object in a 20-foot cube within range is outlined in blue, green,
or violet light (your choice). Any creature in the area when the spell
is cast is also outlined in light if it fails a Dexterity saving
throw. For the duration, objects and affected creatures shed dim light
in a 10-foot radius.
What exactly would the effects be on a creature inside the darkness and faerie fire who failed their saving roll?
Specifically who would get advantage, disadvantage, or be rolling normally (due to cancellation of advantage and disadvantage), in the case of an attacker in the darkness, another outside, and the original creature?