Brotherly Love: If one Lad is convinced of something, the rest of them will believe it.

Spellcasting. The Yule Lad is a 10th-level spellcaster. Its spellcasting ability is Charisma (spell save DC 18, +8 to hit with spell attacks). Each Yule Lad has following spells prepared based on its origin:

Sheepcote Clod:

At will: Animal Friendship
1/day: Polymorph

Gully Gawk:

At will: Disguise Self
1/day: Invisibilty

Stubby:

At will: Goodberry
1/day: Enlarge/Reduce

Spoon Licker:

At will: False Life
1/day: Heat Metal

Pot Scraper:

At will: Goodberry
1/day: Grease

Bowl Licker:

At will: See Invisibility
1/day: Grease

Door Slammer: 

At will: Mage Hand
1/day: Telekenisis

Skyr Gobbler:

At will: Color Spray
1/day: Grease

Sausage Swiper:

At will: Spider Climb
1/day: Blight

Window Peeper:

At will: See Invisibility
1/day: Contagion

Doorway Sniffer:

At will: Locate Object
1/day: Steel Wind Strike

Meat Hook:

At will: Shillelagh
1/day: Hunter's Mark

Candle Beggar:

At will: Produce Flame
1/day: Invisibility

Multiattack. The Yule Lad can make two Ice Pick attacks.

Ice Pick. Melee Weapon Attack: +8 to hit, reach 5 ft., 1 target. Hit: 11 (2d6 + 5) piercing damage plus 10 (3d4 + 4) cold damage.