Ant

Natural Climber. The ant can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check. Additionally, the ant may climb onto any other creature and occupy its space.

Hivemind. When making an ability check, the ant may receive assistance from other willing ants, and use the combined total of their rolls (after taking into account modifiers for each) as the result for the check.

Robust Carapace. The ant may carry objects up to five times its own weight.

Venomous Bite. Melee Weapon Attack: +2 to hit. Must occupy the same square as the target. Hit: 1 piercing damage + 1d4 poison damage. 

For the Swarm! The ant may use the help action to benefit another ant