Mimicry. The raven can mimic simple sounds it has heard, such as a person whispering, a baby crying, or an animal chittering. A creature that hears the sounds can tell they are imitations with a successful DC 14 Wisdom (Insight) check.

Spellcasting. the  undead raven is a 3rd level spellcaster. its spellcasting ability is wisdom.

the undead raven has the following druid spells prepared:

cantrips (at will): frostbite

1st level (4 slots): cure wounds, ice knife

2nd level (2 slots): heat metal,moonbeam

3rd level(2 slots): dispel magic,counterspell

Beak. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 1 piercing damage.