Gnolls

Gnolls: Bloodthirsty.

Advantage VS damaged creatures.

Lvl 2 gnoll - Ambusher
20
Choose one.
  • Ravage (3x).
  • Sudden Rush.

    Move 6, ignoring Opportunity Attacks.

Lvl 2 large gnoll - Defender
45
Choose one.
  • Mighty Ravage..

    (Reach 2, up to 2 targets). Use the same roll for both.

  • Ground Slam.

    (Reach 2, AoE) DC11 DEX save or 1d10.

Lvl 2 gnoll - Ranged
25
Choose one.
  • Ravage Staff (2x). Necrotic.

    (Range 10)

  • War Dance (1 use).

    (Concentration) Give all allies in the encounter Vicious VS damaged creatures and they raise their Primary die by 1 face.

Lvl 16 gargantuan gnoll horde
8
Swarm.

Can enter the space of other creatures. When damaged, reduce HP by 1. AoE attacks reduce HP by 2.

Choose one.
  • Ravenous Hunger.

    (Reach 0, AoE) HPd10. On damage: Prone.

There's no real guidance yet, so I'm leaning on the safe side and putting it at Lvl 16 because the Levels of the swarms in the test document of Monsters and More is very inconsistent. Many of them are tracking the level via the max damage output +1 level (or rounding up). Then we have the scarabs with level damage +5 levels and the scarab horde with level damage + 3 levels.