Bananarang Swarm

Frozen Peel:

When dealt cold damage, that damage is instead negated, and the Banana Swarm's Bananarang attack now deals an additional 1d4 Cold Damage on a hit, this effect can stack every time the Banana Swarm is targeted by attacks, effects or spells that deal Cold damage, Upon activation, the Banana Swarm loses its Resistance to Thunder and gains vulnerability to it.

Sentient Food:

When reduced to 0 by damage that is Slashing or Piercing, it drops 1d4 Rations (1 Day)

Bananarang:

Ranged Weapon Attack: +3 to hit, range 30/60 ft., 1-2 targets. Hit: 2 (2d6 + 3) or if below half health (2d4 + 3) [Bludgeoning] damage.

Bludgeon Rush:

Melee Attack: +3 to hit, range 5 ft., 1 target. Hit: 1 (2d8 + 3)  [Bludgeoning] damage. Requires the swarm to be above half health.